No customer service and still a defective phone

On Black Saturday 24 Nov 2018 I ordered a Samsung Galaxy A8 (2018) model online on the Black Friday special which would be a dual sim phone and my main reason for wanting this handset.

On 24 Nov 2018 I received a call confirming the order and my details and delivery would be 3 working days from the call.

10 Days later On 4 Dec 2018 I receive a phone call saying they don't have any A8 phones in stock and they can't give it to me and asked if I would accept an Galaxy A6 plus as it has similar specs. To which I reluctantly agreed and only later found it doesn't have dual sim. Again delivery would be 3 working days from the call.

7 days later On 11 December 2018 I receive the A6 plus from the courier and during the evening try to do all the updates and install all my apps using more than 5 GIGS of my Vodacom account data.

On 12 December 2018 I after the first call I received (with my Vodacom sim card inserted in the handset) I discover that the person on the other side can't hear me. I had similar issues on whatsapp, voice recordings etc and after some fault finding , like disabling apps that access the microphone, starting in safe mode etc I dicover that the microphone of the handset is faulty . Not even a factory reset could get the microphone working. I sent a email to the online sales after trying the online chat to report my problem (I have screenshots of the chat) Still no reply received from this email

I went to the Middelburg Mall branch of Telkom to report the matter. They could not help me as online sales and branch sales seems to be different companies. The store had A8 phones in stock which puzzled me and I enquired about it as well. In the end they phoned 10213 from the store and I reported the whole matter. They would send a courier to collect the defective phone from me and bring along a new phone, within 3 days of the call

8 days later No feedback or calls from couriers 20 Dec 2018 I try again on the online chat to resolve my problem with no results. (I have screen shots of the chat). I phone 10213 again to report the phone and they have no record of me reporting the problem on 12 Dec 2018. ( I have voice recordings of the phone call). They recon me my phone is active and the contract is going but I have not even opened up the sim card from the plastic packaging to insert it into any phone. They can not answer me on how my 5 Gigs of data that I lost due to a defective handset would be refunded and or how the contract can be active without a working phone and a sealed simcard In the end they said they would send a courier to collect the defective phone from me and bring along a new phone, within 3 days of the call.

13 Days later Today is 2 Jan 2019 and I have not had any feedback or a call from a courier to collect the defective phone.

If my phone issue doesn't get resolved by the end of the week 5 Jan 2018 , I am seriously considering cancelling the contract and would use the consumer protection act as backing If I need to.

This is just appalling customer service ( or should I say the lack of any kind of service)