DSV - Disappointing Service Venture

Very disappointed in their service. I was supposed to have an MTN sim card delivered to me on the 2nd of August. When the courier arrived, the silly OTP system that they use wasn't working, so he said he will log a "manual delivery" for the following Monday. I'm not sure what this means, but I suppose it means that DSV is going to make you beg for your parcel. I've contacted them multiple times via email to enquire as to when I will receive this sim card and I haven't heard a word back. It's the 13th of August now. Highly disappointed and actually tempted to contact MTN and cancel this sim card and lay the blame at DSV's door.