Cannot order ADSL line rental because Telkom cant close previous order

We recently moved to new premises and ordered our landline to be moved. It was moved very quickly and installed on the 7th of January, later that day they activated the product and I can make and receive any phone calls from the landline. To be honest we do not care about voice services, the only reason we want Telkom is for fixed ADSL line rental. The problem however is that we cannot order ADSL line rental from Telkom since they have not closed the previous order yet (the line that was installed on 7 January 2019). I have phoned their call centre numerous times and have escalated the issue three times during the last three weeks with no avail. Each time the call centre representative tells me that they have escalated the issue to the IT and that they would respond within 48 working hours. But to date nothing has happened. At this stage I dont ever want to use Telkom again, but since there is a order pending I cannot even cancel my services with them.