Wesbank not acknowledging payments despite proof!

I had a very bad experience at wesbank after I have been paying my installments regularly and it was accelerated installment and there was an excess amount of more than ten thousand rand which probably became a low hanging fruit for them. A couple of debit orders that went off from my current bank account did not reflect on Wesbank' side.I still have not had any response from them after furnishing them with proof of payment, I have been waiting for them to finish the investigations and not received any feedback, instead I'm being sent from pillar to post. My take is that there's ********** element to this, like the diversion of funds.