Software updated has locked up the phone

Software update has completely locked up my LG Stylo 2 phone & have pulled the battery out & replaced it several times, turned it off & let it stay off until the battery drained down, recharged it & still can NOT get past the message "Unfortunately, Software Update has stopped." & clicking on the OK has done NOTHING. Even took it to Boost & they said "buy a new phone..." but this phone was bought new Jan 2017 & I have been in the store numerous times with this phone going totally dead...the manager taking the battery out, replacing it then it starts back up...only to die again. Very frustrated & I think this phone has been defective from the beginning! Now even with insurance it will cost me a $50 deductible to replace it...what do I do with this sorry ass phone? HELP...& thank you!