Carpet not fit for purpose?

[HarryTheHungryHippo]

Hi everyone I'm not sure if I'm posting in the right place.
I bought a carpet Last summer (9months ago) and a few months ago it started to come away at the edges. The only way I can't think to describe it is like it's shrunk but we've never cleaned it and even if we had used rug doctor like we have in the past with previous carpets surely a non wool middle of the range carpet should not be shrinking?
I went back to the carpet place on Saturday and he said he'd send the fitter out, the fitter came yesterday and said he's never seen anything like it, well neither have I.
I'm just wondering where we stand with this as today on the phone the guy was kind of hinting towards that we had cleaned it or something as he's been in the business's 50years and never seen a carpet go
Like it.
I'm annoyed as usually we just buy cheap carpets but this time I paid more so it would last and this has happened.
It's a small independent store and we went to them because I wanted to support the local businesses but now I'm wondering whether this will backfire as they have no head office to take it further?

Forgot to say that the carpet is doing this in 4 places not just 1. The fitter has said he will come and re stretch it but I don't see how he can stretch something put that is already not big enough? Also where do we stand after that if it does it again, which I suspect it might

They will come out and make it fit with the stretching tool (effectively carry out a repair) you need something in writing saying they are doing this in case it happens again.
Trading standards may help advise you.

I think you have to allow them to try and rectify it, especially as its now 9 months on. S allow them to come out and restretch it and keep a record of the date, then when it does it again contact them and let them know as you have already given them the chance to rectify it you now expect a new carpet to be laid or a refund so you can go elsewhere.

Have they checked with the manufacturer regards any issues elsewhere, it may be that the batch is faulty for example.

make sure you keep everything in writing, follow up any phone conversations with an email or letter by recorded delivery.