When you purchase an account.
1) log in from the link https://m.facebook.com
2) and then check the account, if you find any problem or anything that does not match the description, contact support
3) you have to warm up the account for a few minutes for 24 hours
4) after 24 hours, change the account password, log out of all devices, change the email password, and change the backup email if it exists. If it does not exist, add an email from you.
Check if there is another email or phone number associated with the account. Delete it. Leave only the email attached to the account.
Also, check the ad account settings, and if you find administrators on the account, delete them all
Using: login with link: https://m.facebook.com . Values are separated by " | "