as retired certified uk electrician .what i seen in the last 20 yrs here there is no qualified electricians here ,
in particular my house where i live ,example USE THE BLACK AS LIVE !!!!! black everywhere is negative ONLY
i had a similar situation with Lazada with faulty item just told me to contact THE SELLER direct
i told them YOU ARE THE SELLER !!!!!!!! several e m to Lazada but all fruitless, in the end gave up !!!!