Customer service is the worse I have ever seen

I called on 3/27 to order a replacement tv box. My hasn’t worked for over two weeks.What it’s doing is pixelating on all the third party channels. I have spoke to a number of your customer service people and everyone told me no problem they will send a new box. Every time I check back no box was ordered. Friday night I spoke with another customer service representative and told me I would have the box Monday for sure. Again no box . Is everyone that incompetent that they can’t get it done 

Thank you for visiting our official Xfinity Forums Community support page @user_94c90e. With having issues with specific channels only, that most likely indicates a signal quality issue. Please accept my most sincere apology for the recent experience you've encountered. We are here to help. 

Typically, these are found within the home. Would you be able to check and ensure the coax cable is in good condition such as no hard bends, kinks, bite marks or cuts that could interfere with the signals reaching the set-top box? Another thing to check is that all connections are secured and tight along with removing any unneeded cable splitters or have an extra long cable that is not needed.

With the set-top box, you can quickly and easily visit a local Xfinity Store with the existing equipment and get issued another set-top box. I recommend doing it this way as you would need to return to the store to return the existing set-top box to remove any additional set-top box charges.