You are alleging "Reliable Product Services" sold you 3 leaky vacuum storage bags.
Hee, hee, hee! Sorry, you will see the humour when you look back in a few months.
The exhibition has a web site where you may be able to find some contact detail for these "Reliable" people or contact the organisers to obtain an address.
If you need replacements which will work
Clearly have their address showing and a one year guarantee.
We are supporting the bags at
Because of the quality issue, we doubt they are the same.