How long do we give a service to fix issues

ncc189 writes: The Funimation Roku channel has been basically unusable during prime time for about a month now. With very little feed back from the company and no improvements to the service at all I canceled my account. My question to ./ is how long do you give a service to fix issues before you cancel the service, how much leeway do you give the service's representatives in communicating issue with us? Its seem to me that a few days is more than enough in the internet age, 3+ weeks is beyond reason. What does ./ think?