Internet issues

I work from home and xfinity was servicing their equipment today. Every single time the internet goes down, I lose money.  Or only that, I receive an occurrence from my job because I am unable to work without internet. If xfinity pulls this stunt one more time, I promise you, I will cancel my service so fast and go to a better more reliable provider. At least give your customers a fair warning when you plan on working on your equipment. Why can’t you be more reliable like Verizon or T-Mobile!??? Fix it xfinity or a will take my business else where!!!