No service from BP Joyhurst and BP call centre

BP Joyhurst has the worst possible service, they have a payment method that's always Offline according to this particular forecourt. Bp has an agreement with Vodacom so customers can purchase a fuel voucher from Vodacom and use it at any BP however BP Joyhurst will always say it's offline even without processing a transaction however if you go to another BP up the road they will assist and it will go through fine. I've tried calling the call centre to assist and they advised I drive there and call immediately if I have a problem. I followed their instructions however even they couldn't help me in the end they advised I need to call a third party to get a refund. This is really sad they market and sell you something that you cannot use and offer no support in the end and the people at BP are saying Vodacom isn't paying them for the vouchers that's why they are not processing those transactions but that's not my problem I've paid for something already.