enhancing an image to best quailty

Just wondering if someone can point me to the best person,site, member, etc... to take what we thought was a great image ( I guess not ) and making it a great quality image.

To be used later for sublimation and to send for some embroidering (digitizing)

Any help would be great. This is not for personal gain it is for a volunteer group (Local sports team).

Your helpful suggestions are appreciated. If this does not meet the rules or requirements of the site. Please delete it.

Thanks

 

This is the best image we have
It pixels out in the top edges


thanks