Step1: Go to the "payment settings" of the ad account to add the card
Link: https://business.facebook.com/ads/manager/account_settings/account_billing/?act=XXXXXX
XXXXXX is ID account ads
Step 2: Press F12 to bring up the Devtool window and select the Console tab as shown below
Step 3: Download the code below to your computer using the link below: Download
Step 4: Edit the information in the line below in quotes "..." and paste it in the console tab opened in step 2
- credit_card_number
- csc
- expiry_month
- expiry_year
Step 5: Press Enter and wait a while for the code to run, then F5 again and get the result