No internet

I recently purchased a contract with Cell C. I am unable to access the internet in which I contacted your customer service. The following case number was given to me ***. Neo from technical support called me and reassured me the case will be resolved in which it didn’t. Today, 26th July I received a message that they have been trying to contact which is a lie because my phone has been on. I then called the call center since I am unable to connect with Neo. Only to be told my case has been resolved and closed. How can you close a case without having to resolve it first. If this issue is not addressed I will have no option but to fight this issue legally so my contract is terminated