30 Days to enter new banking details onto system

I am with Telkom Mobile for almost a year now. I have changed to a business banking account. I have changed all my debit orders with all the other companies who either did it same day or a few days. Telkom refuses to change my debit order account details. They say one month it takes to enter these details. I need these details changed urgently as there will not be money going into the other account as it is being closed. But Telkom is lazy and does not care so they decide to take a month to change something so simple on their system. Why 1 month to change banking details Telkom? WHY!!! All other companies do not take so long. i want answers and i want this to be fixed with the debit coming off the correct account. 15 days ago I requested this. Its long enough. Or i will go and change to Cell C. I already changed my ADSL to mweb because of pathetic service from this company. I will change my mobile now too.