Martins in Maryhill, Glasgow. They will service your watch. They have serviced both genuine and replica Rolex for me in the past, it was a replica with a ETA 2836 they did for me a few years back. Nice guy to deal with too. I wouldn't expect him to service a replica 3135 though, they won't be able to get genuine parts as genuine parts are on a old parts return basis (and they can't return fake parts to Rolex!)
https://www.martinsjewellers.co.uk/
I did have him fit a genuine datewheel into a replica 3135 for me though, that's fair game but he won't service one I don't think..