Wrong account Claim payment and no help

I Had surge damage on my Personal Computer at home, I took the pc to a computer store to access what was wrong, He gave me a damage report that the motherboard, cpu and the Ram damage damaged beyond repair. He quoted R10402.00 for the repairs. I submitted a Claim thru the app and uploaded the documentation. Discovery contacted me to send a assessor to look at he pc, he did not know were to switch it on, I complained and they send a new assessor that agreed that the pc was dead. The excess payment was R2000, Discovery only payed R8000 of the R10402, so I payed R2402 excess. And they payed it into the wrong account, I changed the bank account on the 27th of March via telephone. I again told them that the account they are transferring to is wrong, but nothing was done again. I don't want to start on my Vitality drive money back for petrol, There is always a problem with them capturing my petrol pertussis.