It might be worth contacting Vichy (Dermablend) and asking them where your nearest stockist is. You could sample some of the products to see how they work for you.
Do aim to have a professional consultation at some point, though, for the best result.
PS Be sure to talk to your GP about the scarring too. If they are the result of self harm, it's important that you get the specialist help you need to make sure that this isn't something you continue to do.