If you are dissatisfied from any product which you have brought or you have discovered certain faults in it, you better let the manufacturers know about your problem. You can either post a letter or send an email to register your complaint.
You should start your email by stating the specifications of the product you purchased. Mention the date of purchase and price of the product as well, along with the name of the store you shopped at.
In the following paragraph, you should explain your problem to the manufacturers, giving all the possible details. You can also suggest any possible solution to that particular problem, such as refunding, replacement or asking the manufacturer to pay for the repairs.
Conclude your email by paying your regards to the manufacturers and asking them to resolve your issue on a timely base.