I purchased a round trip flight from Tijuana to Acapulco, my reservation code is Q6RVVI. I payed extra for a premium seat for both the departing and returning flight. On April 6, 2021 I had my departing flight from Tijuana to Acapulco, I paid $147MXN plus tax for a premium seat in the front row. The day of the flight I was assigned seat 2D which is a regular seat. I asked if I could move to the front row to a premium seat that was empty since that is what I had paid for, and I was told I couldn't. On my returning flight which is tomorrow April 27, 2021 from Acapulco to Tijuana, I also paid for a premium seat in the front row. Today I downloaded my boarding pass where I noticed I was assigned seat 3D, which is not a premium seat that I had paid $163MXN plus tax. I called the Volaris customer service center, and I asked for a refund since I wasn't getting the seats I was paying for and I was told there was nothing that could be done. The customer service representative did however change my seat for the returning flight to seat 12C which I am hoping will be a premium seat. My complain is to get a refund for the premium seat pricing for the departing flight from Tijuana to Acapulco because I was uncomfortable the entire flight.