Multiply Nu Metro discount issues

I tried to book a movie with nu metro online using the momentum multiply discount. This is the first time I am trying to use the discount for this particular movie (multiply doesn't allow more than one booking of a movie). I called nu metro and explain my issue, the call agent says that I should call multiply and have them "release the discount". I call the multiply call center ( ********** 183) and once again explain my issue. The call agent from multiply says to me that the department that handles those kind of issues is closed and will only be able to assist me on Monday during working hours.

First, how does the loyalty discount not work for something I haven't tried before? Second, how to you offer a service but not offer the relevant support?

Terribly disappointed with the poor quality of service momentum multiply provides to it's members.