Discovery Channel

why was the Discovery channel removed from my plan?  I was not told of this removal and i just watched the channel the previous day and now today it says it's no longer in my plan?  Why does comcast keep removing channels from my already expensive cable plan but continue to keep the high price?  Maybe i need to find a different cable company that will be cheaper and have more channel options.  I have had comcast since they took over adelphia in my area, which means i've been a customer for over 10 years and this is how they repay long term customers?  We are stuck at home now and they think it's a good time to remove channels.  I am getting tired of this from comcast.