Apple Pay Shipping / Billing Address

I CAN NOT figure out how to get rid of some old addresses that drop down when I'm making a purchase on my iMac using Apple Pay. It offers 3-addresses, 2 of which are old. Billing AND Shipping. I've looked at every conceivable data source to correct it - and those obvious locations, where all the solution sources instruct me to go, correctly only only show my current address. I've looked at iPhone Wallet, my Apple ID, Apple Pay itself, various other sources via settings, ALL the credit cards, Apple Pay, Apple Cash in Wallet and via settings, Safari auto-fill on iPhone and iMac, my contacts on iPhone and iMac, etc. Yes, when I actually execute the transaction, I can select via drop down the current billing/shipping address, but it's just a matter of time before I execute the transaction and forget to select the current address and the item is shipped to the wrong address! PLEASE HELP!