******* debit order

I have a problem with B-Sure Africa Brokers refunding me the money they over debited on my account. I took any insurance with the Brokers last month. I agreed that I will pay once off admin fee of R1100, but instead they debited R1250. This amount was suppose to be debited on Monday, 28 October 2019. on the 26 Charl/ Shall (not sure of the correct spelling) informing the that when they submitted the debit order to Nedbank, they informed them that the account was frozen. I informed him that my account was active but to be on the safe side, we rearranged for the debit order to run on the 30 October 2019, which on the day the debited amount was R1250. Not the agreed amount. I phoned Charl/Shall informing him about the over debited amount and he also agreed that. it an incorrect amount and he will follow it up with finance department and return back to me. Since then I have been phoning Shall/Charl every week asking him what is feedback and his response has always been he submitted the finance, and that department will phone me back.

I would like this to be solved, they refund my R150 they over debited my account with

Regards Chumisa