Takealot - false advertising - quality issues not getting resolved

I recently bought a CAT-6 network cable from Takealot. After using the cable I suspected that the cable might not meet the required specification. I requested a compliance certificate / confirmation from Takealot which after numerous emails has not been received. I feel that I have bought a product from Takealot that does not meet the advertised specification, Takealot are not interested in resolving the matter , they have now coldly referred me to the manufacturer for resolution with them. Not acceptable at all.