How to end monthly payment of $.99

As you are being charged the same amount(s) every month, this looks like it could be a subscription you have signed up for. Remember "free trials" do continue unless you cancel them directly.

You can view and cancel your subscription following the steps at How to cancel a subscription from Apple – Apple Support

You could potentially try and claim a refund by contacting Apple's Form > Request a refund for apps or content that you bought from Apple – Apple Support however this isn't guaranteed and it is up to whether Apple allow the refund or not.