Bad Customer Service

I bought a new iPhone X at Digital Experience In Fourways Crossing cash, I went at Vodacom at Fourways Mall to insure the phone since the SIM card is Vodacom, 21 days later as I was calling to check on my other phone upgrade I asked them to check if they insured iPhone X coz I didn’t receive an sms or email from after insuring the phone then they said no they can’t find it on the system, I got worried coz if you use a prepaid you must insure the phone within 7days after purchasing the phone. I rushed to Fourways to check with the consultant that was assisting me, he called the insurance they said Sorry we can’t insure that phone coz it was not purchased from Vodacom which came as a shock to me, he further asked them why didn’t they tell him or me same day when sent them all documents they said sorry they then sent an email to him, he asked them what is the solution for the customer they said Yes it’s our fault for not telling you or the customer on time but there’s nothing we can do. Now my phone is not insured because of Vodacom Insurance