Being retired and a bit of a DIY bod I bought a towbar for my Altea with 7 pin electrics on EBAY for £104. It was a bit of a bu99er to fit though, well the fitting was easy, it was the dismantling and re-assembly of the whole rear end bodywork that took the time.
Rusty screws with security heads didn't
help much either.
PM me for the one that I bought,( not allowed to post a URL).
It came from towbars4cars.
It is very very strong and well designed with everything I needed in the kit.
I can thoroughly recommend the seller, they have a big stock of different types available, many with a detachable ball hitch.
You do need plenty of time to fit it as the car is unusable the whole time, it's useful to have a second pair of hands for some of the time too.
If you can get a garage to fit one in 4 hours it would be money well spent though.