Purchased 5 Liter container of Franzia Merlot on 12/13/18 a filled a 1 liter decanter with the wine. Tasted it and found it to be very bitter almost medicinal. Not at all like previous purchases. Since the Holidays were upon us it wasn't until now that I've had a chance to warn you of what I think may be a tainted product. The container remains in my home with the balance of the wine unused. Is there something you need to do to insure this will not happen again?