Disgusting experience with Rain Internet Service Providers

Canceled rain 5G wifi month to month contract because of the poor internet connectivity, after a long while collection of the 5G device was arranged which was collected on the 3rd of August 2022 and money was incorrectly deducted from my account which a BSS Support Engineer from rain contacted me and said it would be refunded however till today this has not been done.

Called rain help line on the 12th of August, spoke to a manager and asked for assistance regarding my refund, turns out the delivery of the router to rain was no captured on the system from the 3rd of August and my refund was not processed. I was promised that the problem would be resolved by COB 12 August however I still have not received my refund. I left numerous requests to call back for the accounts department and the line manager however no one gets back to me.