One Plus — defective phone

I wanted to tell the no.1. Company in the world that they have broken my heart and soul and also i visited the one plus service center 5 times but they are unable to resolve my problem my phone is having a no. Of problems
First it hangs
Second its body detection does not work
Thrid its contacts are deleted automatically
So i want a brand new one plus 7 pro nebula blue 12 gb ram variant to be replaced with this one and i am ready to pay the difference between the two but it should be free replacement as company claims 1 year of warranty and that is also less but anyway my phone stop working within a month.
I am politely requesting to your company and not being rude like other customers are with you so don't take advantage of that
And what will company do with 58000 if there customer are not with them and 58000 can not run the company i am telling the reality because if you lose a customer's trust you can do nothing