Poor Customer Service

Greetings, So as of end of last year management had changed. Customer service is at a stand still to a point where i'ts non existent, the current 'Manager' seems to have this God like complex toward himself. I had recently returned a K95 Platinum which I had purchased last year. When I first took it it for warranty purposes they refused ti take it, arguing with me that there is nothing wrong. after eventually handing it in after some arguing. I've waited a week. returned to the store to request a status update to which the reply I received was "await supplier feedback"

I took the initiative, i am close friends with the supplier I made my way down to the supplier, RBS had not even sent the Keyboard in yet. I then proceeded to contact RBS to retrieve the keyboard so I can take it to the supplier myself. Only to be told and **** to that the keyboard isn't there... Manager wont speak to me or provide any feedback is to whats going on...