Yes, they keep billing even though I cancelled my subscription.

They keep billing! Customer service is no help at all.

Not easy at all and they continue to bill you despite multiple attempts to cancel service and stop billing. This should be criminal.

It is your responsibility to cancel the membership both at Sittercity and at Care.com as well as most dating sites and any social sites with membership fees. Even if you sign up for 1 month -3 months- 1 year or whatever these types of memberships will auto renew for the rest of your life unless you call the company your self and cancel the membership. Often going on the website and cancelling the membership does not work for whatever reason. If you read reviews on other boards like Care.com and Match.com you will find 1000 of complaints from people that said their credit cards was billed after they cancelled on the computer. However many people forget to cancel and say that to try and get a refund I am sure.
Also starting this year in most states a new law came out for auto renew billing. Anytime a credit card is cancelled your bank or the credit card company will contact the auto renew billing companies such as Comcast, the phone company, electric company, gym memberships, and I do believe internet auto renew billing as well and give them your new credit card as a service. That way your auto renew services are not interrupted. So, gone are the days of getting rid of a bill by getting rid of a credit card. I am sure if you call your credit card company and request this service to stop they will do it, but I am not sure.