I have requested now 2 times a correction on the index for my golfcourse. I cannot use stableford for almost a year now. It's starting to get very annoying. When will this be resolved??

Where have You requested it? 

If here, then it will not be implemented.

Garmin updates their courses twice per year, but if You want changes implemented You need to fill in a form.

Filled in the form twice.