Same thing happened to me over 20 years ago back then it was common to get domain hosting email all from one provider. They hiked up the price to something extortionate and changed the owner details on the domain to themselves cost me a fair penny to get that back from then on I kept my domain email and hosting all separate and stuck with what are hopefully more reputable providers. And of course these days if it happened I'd go straight to legal action something that young me didn't think of.