PATHETIC SERVICE FROM TELKOM

goodmorning please note i sent telkom my cancellation form the end of January already at which time i unplugged my wifi device as well /but up until today they keep on billing me the R900 every month this is totally unacceptable/ and they keep debiting my account which is resulting unpaids on my bank account. when you go into there stores they cannot help you with your account you need to call the call centre where you hang on forever for someone to assist. I would like my account to be corrected since February up to current month.