Payment failure rate more than 90% for my SaaS business

My product offers 7-Day free trial.

I'm using stripe hosted checkout and stripe subscription API. (Setup intent)

At the end of trial, stripe is failing to charge cards of those who have not canceled.

Current success rate is less than 10%

Does anyone have solution to this? what should be the best practise to integrate stripe so that success rate is above 90%.

I am also willing to pay for any professional help.