NCL Terrible customer service - buyer beware

This is our third, and will be our last NCL cruise. We spent A HUGE amount of money to have the cruise of a lifetime in a Penthouse suite on Norwegian looking forward to the "exceptional" customer service, We haven't had our cruise yet, but all of the customer service we have had to date has been HORRENDOUS! Our agent and myself have been on hold hold or the one with them for over 7 hours trying to solve problems THEY created (such as deleting one of our group members) and trying to get Latitudes member cruise benefits (which they said we were eligible for, said they put a note in our account to credit once our agent called, only to have done NOTHING, no note or anything and refused to apply the credit with our agent.). And the final straw is their customer service after a SIGNIFICANT price drop - we understood we wouldn't be able to get an upgrade with our category, but they were unwilling to do ANYTHING at all after a $2000 price drop, when others we know received category upgrades and on board credit. I have lodged a complaint about their customer service and received NO reply from corporate. This is our third Norwegian Cruise and will be our last after this experience. It has really taken a lot out of our anticipation for the vacation. If you want a once in a lifetime special cruise experience and to be treated with consideration and respect, choose another cruise line.