MyContent is a Payforit scam operated by Nexgenmobi.
The typical subscription message reads
Thank you for subscribing to MyContent for £4.50 per week from Nexgen Ltd until you text STOP to 64055. HELP? 02037403517 “
The phone number given appears to be an answering service.
There is a contact email address: firstname.lastname@example.org.
The company uses the 64055 shortcode operated by mGage Ltd and some consumers have reported success after asking them to intervene.