Phone not working after two factory resets

[Lee007]

I can't make outgoing or incoming calls, text messages not being received since I installed DHL app. I deleted this app eventually but now phone is not working properly after I have reset to factory settings twice.

[TRY2HELP]

take your sim out, then factory reset, then put the sim back in see that work

[Lee007]

I tried that but Samsung is asking me for two step verification but I can't receive text messages for the code.

[TRY2HELP]

guess you might need to bring in your phone to your network provider to sort it out for you, could be the sim problem

[Lee007]

With Giffgaff so not an option.

[TRY2HELP]

you can try using family/friend sim card to see that work,