how can I solve it?

I have a professional tomtom go 6200, the dimensions of the vehicle are worth nothing and I have had to leave some streets crushed.
The device resumes when it feels like it, and on some occasions, it deletes recent destinations and the worst thing is that I can't contact anyone, where I bought it I went to tomtom and tomtom does not answer anyone via phone, it directs me to the internet page.
For each other the house without sweeping



Mod edit: Machine translated(Spanish)