DNS Still shows old configured record

Actually i was using a dns server from different vercel account i wanted to migrate it to different account , now the issue is that it was asking me to verify your ownership from your purchase domain platform , which i did its been almost an hour but it still shows that , you have not verify your ownership .

I tried rasing a case , there they told your verifcaiton is done , its still left for our team to release your domain from your previous account . I dont have premium so cant raise a case.

Can somebody help please , should i wait and have patience they will do it by themselves

What domain is it?