Poor Service and rude consultants

I have been sending nemerous email enquiring about my payment as they claim that they did not receive my payment yet no responce till today. I received a call from this ridu xhosa consultant telling me about the account being overdue, i explain to her she tells me to send proof and dropped the phone on my ear while i explain to her about the email sent Please do something about this serious matter as i regret ever making business with this company the service is poor and the consultants are rude and they do not respond to queries