Even that I'm new here but I can help:
had the same issue with my car when I got it 2 weeks ago.
Coolant pipe is leaking 199% and your electric water pump is done. I saw 3 different shops and none of them could find the real problem.
Replaced water pump and tstat- got nothing!
If you replace the electric pump you will get heat but the real problem is in the coolant pipe. Spent a 1000$ to fix it and lots of time.
Normal temp is 105C if it's higher you have a problem.