On 17 July 2021, I called Firestone at 1701 N. Sepulveda Blvd, Manhattan Beach, CA 90266 for a rear end noise issue. I asked if said Firestone had the capability to repair the issue by Monday, 19 July 2021, to which Firestone service personnel, Cesar assured me that it would be done, and an estimate would be provided. I received a phone call from Cesar with the estimate and the details of the repair. I again reiterated the need to have the vehicle by Monday, 19 July 2021. Estimate detailed that all the rear differential bearings of the truck needed to be replaced, and that it would take one day to perform repair. I approved the repair, and Cesar stated that I would receive a call when the repair was completed. On 19 July 2021, another Firestone service personnel, Bryce (Manager) called to inform me that they had received the wrong parts and that the right parts would take another day . Furthermore, if they were unable to repair the vehicle, they would have the vehicle towed to Ford at Firestone's expense. In the latter case, the Firestone bill would be $0, and I would have to deal with Ford. On this same day, I visited the Firestone repair shop, where Bryce showed me the old parts and the truck. Vehicle was disassembled, making it impossible to take possession of the car (drive it out). After further discussion with the Firestone manager, they lowered the bill and would let me know on 20 July 2021 if Firestone could obtain the parts and repair the vehicle. On 20 July 2021, they called and said the vehicle was ready for pickup, repair was completed. Bill was paid in full and an attempt was made to retrieve vehicle, however the center console would not turn on, and Firestone could not get it to work. The console was working when brought in for rear end issue. Additionally, Firestone informed me that they had reused part of the old broken parts to reassemble the vehicle and that it would be covered by a 12 month, 12, 000-mile warranty. I called Firestone corporate and obtained a case number, 2552968. Firestone corporate told me not to take possession of the vehicle, to leave at the Firestone location, and that they would contact me in 48 hours. On 7/21/2021 Firestone called and said that center console was repaired and that the truck was ready for pickup. No one from Firestone corporate ever called me back about the case. I was on travel and did not use the vehicle until 10 August 2021. Upon my return on 8/10/2021, I drove the vehicle. I noticed that the truck started was making noises from the rear end. Then I found liquid on the driveway floor, it was differential oil leaking from the rear differential. I again called the corporate number [protected]) and using the same case number 2552968 told them what was going on. They informed me that the regional manager would contact me in 48 hours. On 8/13/2021 I called corporate again to inform them that no one had contacted me to which they responded that my case would be elevated to a corporate matter and that someone would call in 72 hours. On 8/17/2021, I called corporate again to inform them that no one had contacted me, and they said that someone would contact me from corporate in 48 hours. On 8/19/2021 I called Firestone corporate again, and informed them that no one had contacted me, and they informed me that this case number would now be elevated from a regional matter to a corporate, which is what they had told me the previous two times, which I reiterated that statement to them. They informed me that was not the case and reassure me that someone would call in 3-5 business days to resolve the matter. I am still waiting to be contacted, to have some form of resolution for the vehicle is not drivable, and I am without car and out of $815.16 and perhaps and bigger future bill to address additional repairs needed.