This is an obvious scam. They are phishing for information so they can bill your insurance company for a topical pain cream for which the insurance company will end up billing you for. Do not give them any information.
Or worse.... in order to ship (something that doesn't exist) they will want yor credit card number and address. In order to Bill (which is more BS - they are just scammers) they will need your date of birth and SS#. At this point they can max your credit card up to the limit, and they have stolen your identity. Actually billing for something would leave a trail they don't want.