VW Lupo constantly causes problems, workshop finds nothing

Hello, I’m new here in the forum, but I’ve read several times about certain topics. Now to my problem, for 1 year my Lupo has been having problems. Feels something different every month. Had to buy and mount new tires 3 months ago, because they had left after 5-6 months, now they are almost back again. Track and fall was set, was made on the day where the new tires were on it. Then it was always in front, listened like metal on metal, I found again in the workshop, nothing, except that the brake had to be made in front of it (still relatively new), heat sheet was welded. There is nothing more rattled. 2 days later it started again. Loud noises from the front when driving backwards or steering. Now I have the feeling that the brake is no longer pulling properly. The workshop last looked at this two weeks ago little car, with trial drive, with workshop master, it finds germ problem, but it also hears these sounds, it can not be arranged. I really with my Latin at the end, I have not put up here for a lot of thanks now for your money.