Hi @aelrefai,
This is hard to assess and evaluate without having more context and details, such as the starting environments in HubSpot and Salesforce, the migration configuration and the detailed situation now.
MigrateMyCRM have a help center here where you can submit a ticket: https://support.migratemycrm.com/ – since the integration is not owned and developed by HubSpot but this third-party provider, I’d recommend reaching out to them directly for troubleshooting.
Best regards