Sani Fleet is *****ing our deposits

My husband has been a loyal customer for over a year, in April this year we returned 2 cars that he had hired for business purposes and to this day we have not received a refund for both the vehicles. No one ever takes ownership of this issue, they promise to call back- no one ever does and now we have been given the accountant's telephone number and this number is never answered. we are beyond frustrated with Sani as it seems as if this is common practice for them. Cashflow is a crucial component of running a small business and they don't care what adverse impact they are having on their clients. Their customer service is shocking- you spend over 20 minutes on the line holding on only to be hung up on. Sani must pay pack our money with interest!