This company constantly lies

I was offered a promo to switch once I switched they messed up phone numbers taking part of the promo away I feel was on purpose now there telling me there not going to honor the last 2 months of the promo. I have been dealing with this issue since the month after we joined. At this point i wound rather pay more for honesty and consistency looks like ill be going back to Verizon with all 6 of my lines and internet!