What should I need to pay attention if I wish to use diff. account with facebook ads vouchers? Is it workable?

For the facebook ads, does it ban cpa offers?? I submit serveral times of my ads to change the wording and link. they all finally got disapproved.

The reason:

The destination of your ad or Sponsored Story either violates Facebook's Advertising Guidelines or could not be reviewed.

What does that mean??

Besides, my account get banned. I use paypal to activate it and use facebook vouchers
the reason they show me:

Our systems have detected unusual payment activity on your account

What wrongs did I do?

Thank you so much

please help..thanks