NOT SOLVING QUERIES

I am tired of wasting my money phoning ADT over and over again for the same problem and every time they promise that It will be fixed. They overcharged me with 231, I have been fighting with them since last year and all they do is promise to credit amount which is not done. Then in FEb 2015 I receive an email telling me to settle the R231 to avoid service interruptions, so once again I phone I email them and then the supervisor replies that they are sorry and will credit the amount , This months statement received and again the R 231 is on the statement, today the story is that :We processed this credit on the 26/02/15 after our bill run ,The credit will only go through this week). Always stories with them. I receive two statements one not even belonging to us, this month.<br> <br> I want accounts to sort out my account,