Mint Mobile complaint: Problem with service: Problem with incoming and out going calls not receiving incoming out going calls not connecting

This is my 3rd year of service never had a problem until last month! My out going call’s hardly ever connect! I’ll have to repeat the call attemp several times then it might connect. My friends have reported to me that my service does not work when ever they call. It just goes back to a dial tone for them.
I don’t know what the heck they have done in the past month to cause this terrible glitch?! But they need to undo whatever it was they did!!!!

I am using a Samsung J-3 . 1st time for a Galaxy, it’s not as special as people say.
Mint has told me for the past month that their doing maintenance on the system! I ask them how long does it take the tech guys to complete regular maintenance? Are you sure the guys in the field working on the system are the green trainee’s due to the pro’s going out on vacation!!

I am very upset having to call Mint[s customer support 3-4 times a week! And those agent’s spitting out apologies every other sentence. I so fustrated with having to go thru their bot system before getting a live agent! Then having to hear their insincere apologies every other sentence,so sweet it gives me a toothache!! Seriously! Please help resolve my in and out call connection problems by finding out what the real issues are and hopefully they will get the pro’s out there before the rookies F— up the system beyond repair. Thank you for all your efforts they are greatly appreciated.