Wrong last name on online billing.need help .

Hello,

I talked to an agent weeks ago to get my last name changed on my bill for my internet account. I got married. She got me to email in my marriage license and I did it. She that that , that would fix it.  And nothing has changed. It’s showing my correct name on my account and on the billing for my mobile account but not my internet account. When I call Telus they say it looks like the correct name on their end . But it’s not on mine and I have dented the app and reinstalled it.  Please help.