Recover Hacked Snapchat Account

My Snapchat was taken over by someone else and I no longer have control of the username, password, or any linked recovery methods. I need an expert who knows the ins-and-outs of Snapchat’s support and appeal system to guide (or act on my behalf) through every step until full access is restored.

Here is what I can provide right away:
• The original username and the email/phone number that were tied to the account before it was compromised
• Screenshots proving prior ownership, including old Snapcodes and saved chats
• Approximate date and time the hack occurred

What I expect from you:
• Crafting and submitting the correct recovery/compromise forms to Snapchat
• Direct communication with Snapchat support if escalation is required
• Advising me on any additional proofs of ownership that will strengthen the claim
• Updating me frequently on progress until the account is back in my hands

Acceptance criteria:
1. I am able to log in on both mobile and web with credentials you help me reset.
2. Two-factor authentication is re-enabled under my control.
3. The hacker’s linked email/phone are fully removed.

If you have successfully recovered Snapchat accounts before, please outline a brief plan and typical timeline so I can move forward quickly.
I have acces to old email and mobile number which was associated with my account and the same.had been changed by the hacker