Problem with my dvd player

I just got my disc home at the weekend and have discovered the dvd player doesn't work. It says invalid media then spits the disc out. I notice lots of people mention this and a common fix seems to be to sort out the region setting. But....... I don't know how to do this. I attach a picture of the said dvd player and would appreciate any help you can.
Thank you

Hello and welcome

Welcome from me too

Flossie said:

Click to expand...

- reckon that's a 'stralian DVD player, at least from the picture - no wonder the regions are out