Hi Dannnnn / All,
I had the same experience...my local dealership advised that it was down to misuse and/or wear and tear by the previous owners.
They also advised that the seats have a short warranty period,
so they wouldn't be covered now that my car is 2 years old.
However, they were friendly about it and advised I might be able to get a goodwill gesture from SEAT UK.
So I raised a case with SEAT UK and I have now been offered a goodwill gesture of 100% parts and 50% labour.
My dealer has informed me that this works out as £99 inc.VAT for a drivers seat base cover.
Parts need to be ordered this week but expect that I'll be getting this done soon.
Hope this helps