Thanks for replying. You are correct, I have also noticed that about watches, however, I did try to add a brand new card (initiated from the watch) but still with no luck.
I have contacted Google Pay about this issue and this is what they said:
By the time we are trying to add your card with Google Pay, your bank in declining the transaction or not approving it.
Google Pay is just a payment processor, you initiate the adding of the card, we sent request to your bank, we can’t just use your card on our platform unless your bank approves it.
Now if you can kindly contact your bank, reach the FRAUD department and tokenized your card and approved it, you will be able to use contactless payment that is a 100 percent guarantee.
I have sent that to Customer service but they always reply 1 week after my messages so it’s now been more than 3 weeks! this is really unacceptable customer service and I’m just about to just close my account cause I’ve spent too much time on this.