If moderators fail to resolve your issues and you still prefer to discontinue service, it's actually pretty easy to do, you only have to deactivate your autopay and remove your credit card information, once you're up for renewal your acount will expire and will hold such status for 90 days and then it's gonna be deactivated and not possible to resurrect.
Reminder 1: if you want to port your number out your account must be in good standing ie active
Reminder 2: as with all prepaid services you will not be reimbursed for unused time that you already paid for
So my suggestion is use it up and port out when your data is all used up or couple of days before your next renewal. Dont forget to remove your credit card info in either case
Ps. Good luck and best wishes, if things do change around here and pm starts matching your needs it's also very easy to come back, i believe you still retain your community account it's independent of your selfserve. i'm not sure how would you go about closing it, but you could definitely remove subscriptions or even change the email address to your spam mail if you user one.
