Poor customer services/false advertising.

In February I went into the MTN stores to upgrade my cellphone to the Huawei Mate 10 Porsche Design. This was advertised in the MTN catalogue in February as well in March , and again in April. The stores didn't have any stock since February . I then contacted the customer services on the 16th of March to upgrade but to my surprise they (customer services) also didnt have any stock. They convinced me that as soon as it arrives they will forward to me. After numerous calls and much frustration I 'm still waiting. Then one evening in April the call center department called me to renew my contract . So I explained to them that I'm still waiting for the Huawei Mate 10 Porsche Design which I ordered in March from the customer services and was told by them (customer services) that there wasn't any stock. The lady from call center said that there was stock and I could only get it at the new April price. This was not the arrangement made with customer services. They promised that there will not be an increase in price because they didn't have stock and this was advertised in their March catalogue. So the next day I contacted the MTN customer services to see if they had any stock but to my disappointment they still did not have stock. I have been waiting for this phone since February . Tell me how can a company advertise for a product month after month and not have any stock. It's May now and I'm still waiting for my Huawei Mate10 Porsche Design. Do you think I'll receive this phone at all.????