Useless Mecer laptop and store refusing to refund.

About 2 weeks ago I logged a complaint ***) regarding a Mecer laptop I bought this year in January. When I logged the complaint, I was told I'd be contacted after 24hrs,which should've been Monday or at least Tuesday, I wasn't contacted,I had to call myself to follow-up, to my surprise, your complaints department, instead of updating me,had been in communication with the branch, no one bothered to inform me,which is really poor. In my complaint, I stated that the laptop had a battery issue, after it was sorted,2 days later,the screen flickers, the laptop is still under warranty. Due to these issues, I don't want the device anymore, i use this laptop for work purposes, and have been inconvenienced by this. There seems to be no complaints policy,which is pathetic. East london Hemingways store just copy and paste whatever Mustek says,which shouldn't be my concern as the laptop wasn't bought from them.