I will suggest you do the cleaning yourself. Buy a can of compressed air and clean all vents Rear, Side, Bottom.
If the temps don't g down after that, you can consider opening it.
I do not trust computer repair shops. If you want something done right, you have to do it yourself.
The fact that you made your to this forum tells me you are smart.
Post back and let us know
People... that was a year and a half ago... see the date?
Anyways, I opened it, cleaned the heatsinks, reapplied thermal paste, and installed an undervolting kernal extension. It worked a lot better, only shutting down a couple more times in the year or so that she used the laptop after that.