Sometimes, you don’t hear any sound on the phone.
When you call TSC and been put on hold, you will hear the message asking you to continuously hold.
However, at some point, there will no sound at all and you think your are hung up by TSC. Yet, the line is still up.
My suggestion is that you keep holding for at least one hour. If you still do not hear any voice, you are really hung up by TSC. The average holding time is between 30 to 45 minutes.