Makro absolving themselves

I bought a stove (gas/electric) from Makro Woodmead in August 2020. The oven part of the stove, which is electric, stopped working properly as it wont heat up to the desired/required level. I have since contacted Makro to send a technician to see what the problem is. I am now told that Hisense (the brand of the stove) refuses to send out a technician until I can provide them with a Certificate of Compliance, which was not a condition i was made aware of when I purchased the stove.

I have no relationship with HiSense as I did not buy the product from them. I believe the Makro is absolving themselves from any responsibility whatsoever in this case choosing instead to hide behind this so called policy and I am left with this mess to sort out. Had I been told that this was a condition, i would have made an informed decision to either not buy this product or chosen to keep a copy of the COC handy.