Wrong phone(continued)

I am still struggling to get this matter resolved for contract ********** 026 - please read all the way to Kind Regards. This incorrect handset was collected from me on the 19/03/2019 and delivered to Cell C Midrand. Cell C's cancellations department can't say who signed for the parcel which was collected from me.Nor can they cancel this contract until the handset is back on their system. I understand this. However, according to Cell C, it takes 3 business days. It is now going in for a month since this handset was collected and still no resolution to this matter. Spoke to Lavird at Cancellations on 09/04/2019 and was told that he would investigate. received a call back on morning of 11/04/2019 to say he would have an answer for me by close of business on 10/04/2019. I am still waiting. Tried to get hold of the Cancellations department and after holding on for almost 20 minutes, decided that this is definitely not worth the time. please can Lavird or his manager, or his manager's manager get this resolved or i will take it further. My number is ********** 938( ********** 026 belongs to my son, i am the contract owner)Kind Regards