Have you had an actual court summons? It is important not to ignore it if so, as you will likely get a default judgment against you. that decision though is made by the court (especially if you defend) so it is not up to some shonky solicitors to assume that going to court means a judgment in their favour
If it is just some 'solicitors' trying to frighten you then don't give in to them.
The consumer action group website is very good for helping people defend against shonky debt collectors