Jeweller admitted ring faulty, won’t reimburse a previous repair from elsewhere - England

Hi there In February my wedding ring broke. It’s white gold with 0.25ct small diamonds covering half the band. Some of the clasps holding the diamonds in came clean off randomly and because of this I lost a few of the diamonds. Ring is 3 years old.

I took it to a local respectable jewelers (note, NOT where the ring was originally purchased) who fixed it in 6 weeks at a cost of £350.

Within a few days the same thing happened again. I took it back assuming they just hadn’t fixed in properly - however on their inspection they managed to show me the damage this time was on the opposite sides. Photos they’d taken originally proved this. They actually said this was highly unusual and said if they were me they would question whether this ring is faulty, and suggested getting the jeweller from where I purchased it from to take a look.

I have done this, and the original jeweller has admitted the ring “has porosity” and have said they will just exchange it and won’t charge for the cost of having it looked at.

My dispute is that I would like them to reimburse me for what I have already had to pay in repairs - I have all the receipts and photos showing what the damage was and what was done at the local jeweller. They are refusing to reimburse me despite admitting fault with the ring. Do I have any legal course here?

Thank you for your time.