Debit order failure not my fault

I am AGAIN very frustrated with Teljoy. I received an sms indicating that my debit order failed and I should phone Teljoy. Nothing is wrong from my side but still I have to waste my time and airtime to phone Teljoy to sort this out - how is this even correct?

I phoned your helpline this morning and Ashton told me the first debit order of R 313 was successful but the 2nd one was return and his reason was that the bank account number was incorrect. How does this even make sense when the first one was successful? Furthermore he indicated that the 2nd payment was for August rental? NOWHERE in my contract or correspondence was any indication that the amounts is payable in advance - it only states the 1st of the month which I interpreted as being the 1st after the following month.

I emailed the sales agents yesterday to try figure out what was wrong with the payment but got NO response.

It has been another 2days without any feedback on my emails and now I received a message again to phone Teljoy. Why is this my problem to resolve?

I WILL NOT speak to anyone telephonically as I am paid per hour and I cannot afford losing any more money due to incompetence and thus I expect an email reply.

I am very very sorry that I entered into an agreement with Teljoy and will definitely not do business with them again.

It is unacceptable that I have to go through the trouble of contacting Teljoy numerous times for them to receive money when this is not my responsibility.

Furthermore there was never an indication that I will have to pay 2installments in the same month - which I did not budget for.

Please contact me via email as soon as possible to resolve this as I am not available on my telephone and I will not waste another second on your incompetence.