Sent to debt collector for an up to date account.

I am fed up with Telkom and exploiting my debiting my account when even they feel like it. The debit order when through as per the normal date and I paid extra later for my sim data and monthly spending limit. On the 14th of May, a debit order went through from EDO COLLECTION which that debit didn't go through due to insufficient and resulted in a penalty fee of R110 in my account. The same thing happened again on the 20th of May also this resulted in another R110. I went to the branch in Sandton which the assistance there to me that I have set a debit limit on the debit order form. which I have never signed on both the Cellphone contract and in data sim only contract with I did not even receive contract form for only got the instore checklist only from this sales consultant ***. Why would my account be handed over to debt collectors while my account is up to date. This is really not nice and frustrating. I need compensation for this I can not lose R220 for anything.