Poor service

I bought a new battery for my car from Tiger Wheel And Tyre. They had an advert that showed that you can pay using eBucks. The lady at TWT then said I needed to buy a 1Voucher on eBucks and she would redeem it for payment. I did that, but then she couldn't redeem the voucher. I had to pay cash for the battery. But the amount for the voucher has gone off my cheque account. (Not from eBucks as expected). I contacted FNB and they transferred my 4 times between the Private Clients Service Suit, Helpdesk, Digital Banking Support and finally FNB Connect. I had to explain the situation every single time and that I need my money back. The latest helper logged a ticket with their service provider team and I got an email stating that they will endeavor to resolve the issue in the 3 days time. In the meantime, I'm sitting without my money, when I need it. As you can imagine, I'm rather frustrated and disappointed with the poor service.