Bad customer service

I’m very disappointed about the bad service I received from Vodacom . I called Vodacom on the 1st of December 2017 to cancel my contract as it was due for upgrade and spoke to Mable (Vodacom upgrades ) and she convinced me to upgrade for a special of 150 minutes and 1G data and I opted to take it. She promised to send me Nano sim card with the device but to my surprise I only received the device on the 06th December without a sim card as promised. I called Vodacom to confirm the offer and I spoke to Tertias (team leader) who confirmed that the offer was for 150 minutes only not for data and I immediately informed him to cancel my contract and he convinced me too not to cancel the contract and he will allocate the 1G to my contract for 24 months and he advised me to log a request for the NANO sim card which I logged the request on the 08th of December and I was promised that I will get the sim card on Monday 11 th December or latest by Tuesday. I phoned on the 13th to do a follow up and another agent confirmed that my request for the sim card is not reflecting on their system and I requested to be transferred to the team leader Tertius and hold on the line for about 40 minutes to an hour without luck and I was told by an agent that he is busy on the line with other escalations and he will return my call but he didn’t fulfill the promise and to date I’m still waiting for the sim card. I would like Vodacom to send their Ram courier to come and collect the device and cancel my contract if I don’t get sim card by tomorrow 20th December because they don’t care about clients and they are giving us false information to keep us on their business without giving us the best service we deserve. There are better service providers than Vodacom.