TELKOM POOR CUSTOMER CARE

Hi

I have a taken a contract with telkom for data and a router and asked the lady in the shop to debit my account on either the last day of the month or on the first of the month but they haven't been doing that, instead they debit my account on the 5th or the 6th of every month. The account they are debiting is my Standard bank business account which I am trying to close but cannot as I have tried calling telkom many times to move the debit to FNB with no success and now I have to leave money in that account so they can debit. The past month Standard bank deducted more than they normally do thus, resulting in insufficient money for telkom to debit my account. I transferred more money into that account that very same day and called Telkom for which, I was transferred from one person to the next and the next, this went on and on for about an hour speaking to various people without a positive outcome. I was also told I must now a further R227 on top of the 549 which I normally pay, for what? It's not my fault if they decided on their own to debit my account on the 5th or 6th of the month! I received and SMS now saying I must pay R1098 or my account will be suspended??? This is unfair. Please assist.