Items purchased on Amazon can be returned through Amazon's Return Center https://www.amazon.com/returns as long as it's within the 30-day window.
We do ask that you mark the front of the Earplug box with an X so it is sure to go into Amazon as a returned item.
If for some reason, Amazon will not accept the return, please reach out to our support team at email@example.com for further help.
Also, before submitting a return to Amazon, we would love to try and help and get the product working for you. If you contact us at Decibullz Support and include an image of the molds, we will be more than happy to help.