The White Window Curtains review for Pop Convert ‑ Pop Ups, Banners

Installed their Add to Cart pop up this morning and it has COMPLETELY broken our site. All ADD TO CART buttons on our site have stopped working, so sellers can't buy anything. This is as bad as it gets, and yet there is absolutely no urgency on their part to fix this for us. We deleted the app but the residual code is still on the site and has essentially SHUT DOWN OUR BUSINESS altogether. Utter garbage of an app with equally abysmal level of customer service.