MarketPress - Checkout now Failing

HI Following struggles integrating Ultimate Facebook and MarketPress, which i've removed for the time being

https://premium.wpmudev.org/forums/topic/is-it-possible-to-sign-up-with-facebook-with-membership-pro-2#post-1149593

I've removed Ultimate Facebook. But i can no longer check out.

I've had problem after problem with the integration of Appointments+ / MarketPress and Membership and even though i've had support - it's really been a total nightmare.

I need this to work as soon as possible.

Buttons aren't firing - on MP checkout. I can't login or continue as guest

http://www.silverstreetstudios.co.uk/my/store/checkout/

Thanks