About telephone salesperson

Last couple days I received someone said from telus, and tried to convince me to change my phone plans. Anyway, at the end, I don’t have a credit card, so the salesperson on the phone texted me the emails for e-transfer of the deposit for the new phone and activation fee. But the email the salesperson gave me is: [email protected]
Something from gmail, so I’m now worried if this is the scam. So if someone knows about it, can anyone please tell me if this is legit or not.

Thanks