I don't think that you have cause for regret - unless you approve an answer, your deposit is theoretically either refundable, as I understand it, or else usable for the next question (on any subject JustAnswer covers) in future.
But I have no power (as a JustAnswer Expert) over billing, payment, account or subscription status, and so forth. For all issues of billing, payment, subscription terms and status, etc., I must refer you to Customer Support at JustAnswer.com, which may be contacted through:
They will no doubt address your concern, if you contact them, with reasonable promptness.
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