Mrs Pie had our car MOT'd in April. She couldn'ty find the certificate and went to the garage to get another copy of it. They told her they had no record of it being issued and that it wasn't registered in the government database. After she paid for another MOT, she found the receipt from the first one. The garage are now saying that for some reason they didn't bother registering it when it was done initially, but seem unwilling to refund our money for the second, unnecessary MOT.
Are they legally allowed to do this?

