My colleague moans about being too busy, but refuses any help

They have also complained to my manager that I don’t support them. What should I do?
Twice a week we publish problems that will feature in a forthcoming Dear Jeremy advice column in the Saturday Guardian so that readers can offer their own advice and suggestions. We then print the best of your comments alongside Jeremy’s own insights.I work in a small team for a large professional services company and have a colleague who, while constantly bemoaning how busy they are, refuses any hel