Hello, my name is XXXXX XXXXX it is my pleasure to assist you with your question today. Were electronic tickets sent to you as well, or just paper ones?
To answer your query in the meantime, looking at the terms of Getmein (those in the Buyer's Agreement, which you would have agreed to when you made your purchase), it does state that in some circumstances e-tickets can be issued and they would be just as valid as paper ones, although it would depend on whether this was an option in the first place. So check to see if an e-ticket was an option and if you can get a replacement in such form in any way. However, if this was not an option to start with then they do not have to re-issue one as an electronic copy.
The main term that would apply to you is found in Clause 3.6, which states that " Lost, stolen or damaged tickets can not be duplicated."
Once the tickets have been successfully delivered to you, the seller has no further obligations towards you in terms of their safety or replacement - they are effectively your full responsibility. They can only be held liable if they have failed to meet the original terms, such as provide the tickets in the first place, if the venue or act is changed or cancelled, etc. None of these would apply here because we are dealing with an issue where the tickets were misplaced whilst under your control. As such you can only rely on a replacement in accordance with the terms of the contract you entered into when you purchased them. These unfortunately do not allow for a replacement to be issued and I presume this would be in order to combat fraud.
I'm sorry if this is not necessarily the answer you wanted to hear but I hope you understand I have a duty to be honest and explain the law as it actually stands and sometimes this does unfortunately mean delivering bad news. Please let me know if you need me to clarify anything.
I wouldn't say so because it just means the original tickets would have remained valid for the new date. The terms also state that "If an event is re-scheduled, Tickets will often be valid for the new date and you will not in any circumstances be entitled to a refund for a re-scheduled event. "
Even if an event was cancelled and not rescheduled you would have been expected to return the original tickets to be entitled to a refund
You are welcome and sorry it was not better news