Payment nightmares

I am utterly disappointed in Cell C as a company. They force one to have a debit order and then deduct on any date as they please, although they ask you to specify a date. They rarely stay with the date specified so one is forced to pay the money into the bank because they do not have the facility to pay the money at the branches and they refuse to cancel debit orders for eft or cash payments. So when one goes to the banks at the end of the month it is overly full and I decided to pay my account at the ATM. The amount was R 201.00 and considering they do not take coins I paid only R 200.00. Thereafter they tried deducting R1 from my account and due to personal circumstances there were no money available in the account. Now they want us to pay in R75 penalty fee for a R1 debit order. How is that logical? Could a small amount like R1 seriously not be carried over to this month's account? How does any company explain to deduct a debit order of R1? And when making an enquiry the store clerk was very arrogent and unhelpfull. This is not the kind of service expected from a celphone provider. I have been a prepaid client of Cell C for a long time before taking the contract and I could not be more disappointed and regret that choice any more than I do right now. I will definately not be upgrading my contract with them when it ends.