Merchant Service not crediting funds since 07 Oct

On 07 October a credit card transaction was done on our Speed-point and on the very same day authorized by the customers Diners Club Services. Till today the funds are not in our account. We called the Merchant Service yesterday (reference ***) but still no credit in our account or any reply.<br> As the funds are cleared from the customer's bank for one week now, we expect the funds in our account during the working hours today plus 9% home loan interest for the meantime as we had to use the funds from it and a apology in writing with a valid reason why it took so long. Interestingly it is the second time that it takes so long and again it is a higher amount than our usual transaction, so it easily gives the impression that the bank is working with our money before they pass it on...