Grapevine pest or disease HELP.

I have a problem with an old grapevine in a pot. Budburst was about 10 days ago and the leaves are puckering quite badly. There are brown lesions and holes on the new leaves. The stems are covered with something which looks like candyfloss along with the underside of the leaves. Can anyone please help, as I have gone through everything from mealybugs (no evidence of mites) to phomopsis!