Not refunding a defective mattress when spec is incorrect

After multiple email exchanges - Your support agents have not offered correct info for this declined return (MRRN-OZ84P-OOD4) I.e. having needed to return it in 7 or 30 days of delivery.

I feel the return is completely justified under your returns policy, as below:

Under secton 2 of your returns policy the only place it refers to 7 days from delivery/collection is for Products "damaged on delivery". This is not the case - the product is actually defective because the manufacturer did not produce it to specification (it is 2cm too short at 178cm not 180) and not suitable for an adult to use.

It therefore should be returnable under section 3 of your policy (standard warranty), which allows for 6 months under standard warranty for "defective products".

This product is defective being the incorrect size as specified and advertised on your website.

Please could you kindly process the return in light of this. Thanks