FNB Device sucks!!!!!

I went to FNB on the 30 July 2015 to take up an LG G4 phone and form last year 23rd of December 2015 my phone didn't want to switch on up to now, I have been bouncing emails to and from with them but they are not assisting me instead they are creating more problems for me. They are so bad and they have insufficient knowledge about the products they are offering to the public. They must stick to banking and let network providers to do their job with cellphone. Its been 3 weeks I don't have a phone