I don't see how you owe DirecTV anything at this point. They accepted your cancellation what, four years ago? It was their responsibility at that time to settle any outstanding money.
The fact that their internal audit showed they didn't collect enough tax might have held water within a reasonable time frame, say 90 days. For them to hold you liable for their mistake after this long is unprofessional.
The fact that their internal audit showed they didn't collect enough tax might have held water within a reasonable time frame, say 90 days. For them to hold you liable for their mistake after this long is unprofessional.