DebiCheck Problems

After 2 phone calls of 11mins.and 10 mins. (Ref Nos.Rt*** and Ry***) to the call centre, I still have not been able to get my DebiCheck problem sorted. All I want to have done is to change the debit order date and to have the debit order taken off my savings account. I have receive 2 confirmations with different dates. I really don't want to phone the call centre again so if somebody at FNB with knowledge of DebiCheck could contact me I would be grateful.