I bought a couple of items from a retailer and they charged my credit card twice, after I complained they credited my cc with the amount they owed me.
A little while later I noticed something odd, my cc balance was going down ! I checked my account and the same retailer had credited me with the same amount they had previously on Monday through Friday for a grand total of approx £55 miscredited to my cc.
I reported this to the retailer immediately and they stated that it was a known problem and when I asked them what to do they said they would be in contact with me.
Its now seventeen months later, what responsibilities do I have regarding this amount ?