I tried to pay the monthly VIP subscription with my paypal account, as I dont have credit cards.

After 3 trials over 3 days, it never got through.

The message of model mayhem or paypal:
At this time, we are unable to process your request. Please return to Model Mayhem and try another option.

I am sure about my password.

What should I do?

Try asking in the Site Related section, or try a CAM and see what they can say also !

Just wrote a Contact-A-Mod message. Hope get reply soon!

Thanks!

Please be patient, one of the admins that deal with billing will respond. It is the weekend and I know one of them is off weekends.

Were you able to solve this issue? I have the same problem. No option for Paypal payment

Keep in mind Paypal is "disconnecting" from Ebay ownership.
I am sure that keeping the Ebay payment integration working is Paypal's top priority at the moment.