Are there any authorised Samsung Service Centres where you are that can take a look at your phone @Donking ?
Some self help troubleshooting tips can be....
I wish you all the best @Donking
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help.
Thanks a lot for your concern and detailed response. Have already done all you suggested and in the process of installing relevant apps anew.
Have already visited a Samsung outlet in my current location and the problem was alien to them as well. That my phone was of a different spec (Dual sim) made for a different market didn't help either. So it seems am only left with the option of taking my chances with the sick phone till whatever is wrong with it is diagnosed.