LGG4 Stylus problems

I have had this phone for 2 months and have immense issues e.g freezing permanently, bombs out, cannot save anything as the phone says it already has 328 gig stored which is impossible. I took the phone to Vodacom The Glen last week Saturday where they informed there is definately a problem. They the got the LG rep to look at it and he agreed it's a factory problem. Phone has to be booked in. This phone is needed by my son daily to contact me. They sent me to Alberton to book in phone and get a loan phone. Ride all the way there to be told they no longer fo it at that branch and I get sent to another branch. At next branch I am told no loan phones as people keep the loan phoned if theirs can't be fixed. I contact LG rep, Sabelo and he promises to get me one and will drop it off at Vodacom the Glen. A week later and still nothing. It is unacceptable to struggle like this. I insist on getting a new phone and for that matter a different phone as it seems the reviews on this phone show this common problem. The manager at the Glen even did screen crabs to prove the problems this phone is giving.