Poor and appalling customer service

Ongoing issue, simply cannot get this resolved. Pending transaction on my account that keeps my account on a negative balance. I need to close my account, but due to a negative balance it cannot be actioned. Order for Mr Delivery paid for and received on the 21st January. Back and forth between Capitec and Mr Delivery without any progress, they are shirking responsibility on both sides. No one is prepared to call the other and resolve this matter. So, this pending transaction just remains. Totally and absolutely appalling and diabolical service. Surely, this can be addressed and the Capitec system can be manually overrided to bring the system up to date?