Non - existent back end service from African Bank.

Have tried to speak to someone regarding a query for over a week. Have used up 120 min of airtime ( I actually added it up), just to be put through from one department to the net, to the next and being given incorrect or non existent telephone numbers. the only department that actually works is sales and I AM NO BUYING!!! I need back end service and I cannot get this. I know that Covid has created chaos, but if your Sales Department can function, surely you must be able to back that up with back - end assistance. By the way, the branches are of no help either.