pathetic service!

I opened a new account and made a purchase for the 1st time in Feb. 1st installment was done via eft and was successful. In March I received an sms stating they are changing their processes and I should use the full account number. I proceeded to do so at the appropriate time and it rejected as there were too many numbers for the required field. I called in and was advised to make use of a shortened version of my account number. After a week I received a message saying I have still not made payment. I called in and was told not to worry, eft payments usually take longer. Another week passes and I receive another message stating I now need to make a bigger amount because I was late, and to avoid being labelled as a bad payor. I called in AGAIN and was advised to send through bank statements showing the payments. I did so and was advised I will have feedback soon. I called 3 days later only to be told nothing has happened. When trying to sort out the query I was told a separate department deals with proof of payments. They are unable to transfer and I had to call the number they gave me. In the space of 10mins I called in 3 times, received 5 different contact numbers, still nothing!