Unlike some others on here I do not think it was your fault that you were subscribed to this service without your consent. Remote Games Ltd were fined £70,000 with £15,000 costs in February 2015 for a very similar fraud.https://community.giffgaff.com/t5/Help-Support/HELP-I-am-being-scammed/m-p/21024797
I think some members on this forum need to stop blaming the people being scammed and set their sights on the scammers. Playing a video on Facebook does not constitute a consent to charge £4.50 to your phone account. Neither does the fact that someone has accidentally (or deliberately) entered your phone number on a dodgy web site. The regulator requires that these service providers can prove that they have informed consent before making these charges.
Please insist on getting a refund from Remote games Ltd, but also report your case to the regulator. If everyone who was scammed in the threads above complains, the regulator cannot ignore them.
Please feel free to contact me if you need help in obtaining a refund or in making your complaint. I want to see Remote Games Ltd closed down permanently this time.