bad service wifi

I am so disappointed in Telkom, I requested you guys to debit on my account every last day of the month of my Wi-Fi, but you guys decide to debit on the 25th, obviously there won't be any money in my account by then now i am supposed to pay double the amount with interest I Called costumer service no one could give me an explanation. Went back to Telkom Fourways Mall the guy there told me the reason there my amount is this high now it is because Telkom has increased Wi-Fi ratings..I asked him but how are changes made in my account with being notified as I have not received any notification...he said everyone has even him and also collections have to debit on their side too...as if I do not know what collections is....he further explained to me that on the system it shows that my debit date is on the last dated problem is not on their side but customer services fault ..I asked him but why was the request from the 25th he stated that the problem is from customer service....I requested to cancel...He insisted that he won't be able to assist me on that because I have to pay all the money...i told him I will only pay the amount we agreed on and the date we agreed on....Iam disputing that double amount with interest and request my Wi-Fi to be removed from suspension r just cancel it.....and if it means we need to take it to the ombuds so be it!