Can someone please help?

I have purchased a universal remote control, as the original one got
lost, and accidentally discovered "hidden service menu" so I tried to
perform the auto-installation.

The problem is that on the blue screen that showed up, there are
language options to select, and it says: "Red button to select, Blue
button to store" but when I press either blue or red button, nothing
happens.

I have tried all the codes for the remote control programming, but with
neither of them, blue/red/green/yellow buttons worked (they are for
color/brightness).

How can I exit from this auto-installation screen??? When I switch off
the tv and then switch in on it goes automatically to the Blue
autoinstallation screen. The remote control doesn't have the
instruction manual and the manufactureur ignore my question. The remote
control is HQ Nedis RC Universal 29.

Thank you very much!

Silvia