Spar Billed me Twice and now Refund me.

I made a purchase at Spar in Noordwyk on Lever Road, only to be billed twice for the say items and I was told the transaction didn't go through even though my account says so, the Spar manager came to me and told me that this has happened to a lot of customers in the shop and I must phone my bank, after I spoke to my bank I was told the transaction did go through and the funds are in Spars account, Spar told me they cant do anything I must sort this out with my bank. So I have decided to let them have my hard earned money I guess my mistake was buying from there, so please be aware of using yours cards at this Spar in Noordwyk on Lever Road, and I assume its a problem with all the spar because I have a letter stating there is a problem like this but they are not involving themselves in resolving the situation that they put it.