Tv went in for simple service and came back damaged

Took my tv in to have it's backlight replaced. TV came back with deep scratches all over the stand and dirt under the screen, obviously from when it was opened.

I was told TV would be collected Friday around 10am to be taken back, I sat at home all day and was told "oh sorry Technician is fully booked".....Saturday they made time to fetch my tv...Monday no calls, Tuesday I call in and was told it hasn't been assessed yet.....

So now tell me firstly do you guys not turn tv's on after doing a repair to ensure it is fully working and you left no marks on the screen after opening it up? Secondly how on earth can you hand back a tv after damaging the stand with extremely deep scratches? Thirdly you make arrangements to collect and then just don't bother calling a client, making me waste an entire day waiting at home? Fourthly you take 2 days to 'assess' a tv after I already told you what was wrong?

***********!!!