Problem canceling multiple domains

I registered 200+ domains with you guys a couple of years back, and I tried to cancel them after you changed my registration from $9.95/year to $34.95/year without any warning.

When I tried to cancel the plans, I was dismayed by the fact that I cannot do it all at once, but must cancel each one individually. I thought that I'd just suck it up and go through them one-by-one, but have been even more annoyed since every time I tried that your server returned an error.

I feel cheated that I have been paying you close to $6000 / year for services which I do not benefit from nor could I remove myself from, which will become $12,000 total this year.

The worst of all is that I could not find a single contact information to report this situation while this is happen.

It would be great if you can do something about it soon.