Need heavy duty zip repaired/replaced

Hi all,
I have a heavy duty material case in which to protect an audio speaker. The heavy duty zip has in part, become detached, and I need it sown back on or replaced.

Can anyone recommend a workshop or person with a sewing machine with this capability?

Thanks in advance.

Definitely the shoe doctor La Marina down the side by Lidl. She's very good

Yes the shoe doctor la marina she is excellent at her work and very amicable

Thank you for you responses, will contact her