Avast Antivirus and bad support

I decided to accept an offer from Avast and bought a package. The money went off my account, yet my benefits on the program didn't correspond. I wrote to them and an apology was given and added benefits promised. Those never came to pass. More emails, no response. I just received a reminder that my Antivirus Fee is expiring - evidence that my money was taken but I never got the benefits. Writing more emails is futile and a waste of time. I'm done with Avast and am very disappointed.