"After purchasing from these people I suddenly started getting e-mails from "jagex" claiming I'd been RWTing and to log in to runescape. They either sell your info to hackers or try and hack you themselves."
We receive hundreds of orders every day and the vast majority of them are from satisfied returning customers. We would never hack our customers or sell their information. We want to keep our customers happy so that they return to us for more business over the course of many years to come.
The emails you claim to be receiving are not from us and unlikely to be from Jagex. Please check the sender email address. Runescape players receive spoof emails all the time. Most likely your email address has been obtained by a scammer via a community site or instant messenger.