Dishonest tyre shop fitting the wrong tyres to my car

Dont trust this place. Check your tyre size if they have fitted the correct size. I discussed tyre size beforehand and the shop confirm all. I got tyres fitted to find out the next day that they were thr wrong size tyres. Now this shop does not want to give me the correct tyre size I paid for. Now they lie and make up stories saying they told me they are fitting the incorrect tyre size. There is no way I would get andnpay for the wrong tyre size. DONT TRUST THIS PLACE