Carnival Cruise Lines review: No communication/cancelled my reservation

My family booked a cruise. They had the option to split the payment over two months which I opted for. I received the initial confirmation email for my first payment. However, that was the last communication I received from them, and, as a result, I missed my second payment. They never e-mailed or texted or anything (unless their e-mail went to my junk folder, which is possible, however, the initial confirmation e-mail did not). They just cancelled my reservation and I didn't find out until I went to look up my reservation on their website the week before the cruise. Because the cruise was full, they could not put me back on the cruise and kept my initial deposit. Person I spoke with was not helpful in the slightest. Fortunately, I had the traveler's insurance, which allows me to recoup 75% (not the whole amount) of the deposit but only to apply to another cruise within 4 weeks. Not impressed at all with the service.