The wall socket does not fit to the wall socket port of the cable. The output port from my wall doesnot support push in cable part.

However very next to this output box, there is another arrangment. But I am not sure though.

I presume I need an engineer to install the correct socket?
I also presume this will not incur any further costs?
Just before dialing up Martin's phone number, I thought it would be a great idea just to ask the community once.
Many thanks and regards
Achyut