Swiggy — can't create account

Address:

Chennai, Tamil Nadu, 600028

My number's changed and someone else is using it. However, since swiggy clearly isn't savvy enough to have seen these issues come up, i tried to register with a new number. But it won't let me do that. Apparently, because my e-mail id is already registered.

So i don't get this. Can't log in, without the old mobile number. But can't create an account without a new email-id. And i don't think i'd want to create a new id just for swiggy, cause of your incapacity to work around this.
I really think you guys need to work something out for this. Asap. Please.