Poor service at its best

I bought a sim card from rain unaware that they do not have network range in my area, I called their client care and I spoke to a lady called nombulelo, she did not explain to me that I should cancel the sim card if there is no signal range in my area, instead she told me to keep the sim in my phone as she is going to escalate the issue, I then got no feed back for about 3 weeks then they debited from my account, when I called to ask why the agent called mxolisi could not give me a clear answer or a resolution, so I asked to speak to his manager who was currently busy according to mxolisi, he then told me the manager will call me after work and that never happened. Today I called them several times I still don’t have a resolution and they refuse to allow me to speak to a manager and they tell me I will not be refunded for a sim card that never even had a signal. This is just poor service at its best.