Error on bill

I received my bill on the 4th of Feb and I noticed that I was charged a rejection fee of R200.98 because telkom decided to try and collect on a date I never select....my original payment date was the last day of the month and that is what I selected when I took the contract. In recent months I've noticed that they would take funds out whenever they noticed that I have funds...I feel it's unfair of them to charge me this amount as the 25th was never the agreed date....and I also noticed that I was charged a once off bundle fee of 168 rands on my other 2 numbers numbers..I don't know why I was charged this and I would like to complain about the ******* that telkom is trying pull on me