Hello Luis! When you have a new fanpage, it is advisable to make several organic posts and have a normal behavior for a few days interacting with other accounts and getting likes on your page, thus avoiding blocks on both the fanpage and the ad account.
Facebook restrictions are temporary, to find out the reason you must go to the top left in your ads manager where it gives you “All tools” > “Account quality” from there you can see in detail the reasons for the restriction of your account. You’ll then be able to request a review if you wish, and you’ll keep in touch with Facebook with status updates.
To avoid this in the future, we recommend you “warm up” both your advertising accounts and your Fanpage if it is new, you can do it by making publications, getting likes and interactions on your page, and that your first campaigns are with the objective of interaction or traffic. We also recommend that you advertise from a commercial advertising account, and not from your personal one.