Very bad

I have filled my tanked yesterday at 17:00 at the Dalview Engen, i swipes my card and it sayd declined on the system. I draw cash instore to pay the account. Moments later i recieved an sms to say that the transaction went through on my card. Ibwnet back today at 18:00 to query it. I spoke to the manager on duty and he said i must query it with the bank as it will be reversed back to my card within 24 hours, that hours has longed pased and queried it with my bank and they stated that the transaction went through on their side. The manager still didnt assist me. What you gonna do with this situation. I have been double chargesld and so to say, paid double for one thing. Showed hin the slips and wanted to show my bank statement as well, and wasnt interisted.