The 1000 credit works as a monthly credit. The do this to prevent people from ditching after the discount. You’ll get somewhere around 200 to 400 as an initial credit depending on what phone you traded and the rest in monthly credit.
Keep in mind you won’t get any credits until they have your phone. Right now you’re only paying a down payment, tax and 35 scamtivation fee.
If you did it right, you should have something similar to my screenshot in one of your emails.
May I see the screen shot so that I can confirm?