They are under no obligation to do so. Some will try, but it usually depends on how well a show is selling. The less successful, the better chance you have (in most cases).
The only suggestion is to go to the box office when you are able to, with tickets in hand, and explain the situation and see if there is anything that can be done.
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.