Pathetic company ever,money riping

I've connected with webafrica using mtn,sim was delivered,since then is frustration after frustration,you can't get them over the phone,you chat with them on chat box,their service is pathetic since connected with them I've used internet only less than a week,soon you pay they lock your Sim.ive join in June requested to cancel your find that cancelation will happen in September mean time I must pay for service that is not rendered as soon you pay they lock Sim I've payed R299 for July with not connected,now I've received bill says outstanding of R299 is needed fir what now I'm connected with other company and no hassle,but web africa is riping me off,when I joined it was pay as go no contact, but now they want me to pay for August and their Sim was locked a month ago is not in use,I wouldn't recommend my worst enemy in this company, I regret signing with them,I never enjoyed their data at all , I'll rather buy data than to stay with them