Need help to delete a pixel that was integrated via GTM

We require the removal of a pixel that was integrated through GTM a year ago by a former colleague. Unfortunately, we lack any information regarding their GTM account. While the optimal solution would be to remove the pixel via GTM, we have lost access to the account, preventing us from doing so. I kindly seek your assistance in removing the pixel from our website.

The pixel integration article is shareasale.atlassian.net/wiki/spaces/SAS/pages/1587675137/GTM+Tracking+Setup

The Conversion Pixel Tag: www.shareasale.com/sale.cfm?amount={{transactionSubtotal}}&tracking={{transactionID}}&transtype=sale&merchantID=106900

This pixel that cause mult deplicate transactions with $0 postback to the ShareASale network, kindly check below.

Please help!

To temporarily address the problem, you can alleviate it by removing the GTM container snippet from your website's source code. Identify the GTM container code within your website's HTML files and either delete it or comment it out until the pixel issue is resolved.