Refund for inconvenience

I was a Nashua Mobile client. Altech took over my contract but did not do a proper transfer of data when they did so. As a result they did not have my correct e-mail address or debit order information. I received an SMS in February to say I owed them money. I was surprised since I have a debit order and have been paying by debit order for more than 3 years. I called the number on the sms and they apologised and told me to ignore it as he could see that I paid via debit order. I did not get statements and so a few weeks later I went to the store in Nicolway and I asked the consultant if the debit order was going through and he said it wasn't and that it would all go through on 1 March. I have been asking Autopage for invoices from Feb. Finally today when I followed up for the 10th time a lady sent it to me and said no payments had gone through. Now I am saddled with a bill of over R2000 due to the incompetence of the Autopage staff. I will pay the amount but I want it to be reduced because of the time and effort it has taken me to get this sorted out. It is shocking that the client has to follow up to pay you.