Bad Customer Service

After I have payed my contract for two years with Cell C I'm still struggling even today. I used to check my monthly bills on the app nothing is reflecting now even when you try to send the pdf on your email still not receive it. I called in several times asking them to send me my statements, I haven't received one. In May my line was closed around the 3rd I called and asked they said there's an outstanding balance, I asked so is it my duty to always call and ask for the balance if I clearly asked to be send a bill. I canceled my debit order as they were debiting more than what is expected and my payment date at work changed from the 27th to the last day of the month. I payed on Saturday made an immediate payment and today my phone is closed. I payed more than the actual amount but I have no services now I can't make calls. Cell C it's pits I can't wait cancel my contract.