Pathetic service to a new customer

On 15 October I placed an order for a Mtn month to month contract Sim, sales agent completed the necessary via telephone and told me Sim will be delivered by 10 days, to date, I have recieved nothing. Once I placed the order with Mtn, I canceled my previous data supplier knowing that by the start of November I would have the mtn Sim. I logged a query on 27 October and got a response that the query was escalated to cancelations department and that I could email them which I have done with no response recieved since, I logged another query 2 November, this time I was told to contact the courier company which I did, they had no record of my details. I then logged a complaint which had a 24hr turnaround before being contacted, it's been Over 48 hours, the only time I was called was for the sales process, nobody had the decency to call me since the queries nor do they know where what's going on with my order. This is just pathetic service given to a new customer and it's put me in an inconvenient situation