BAD SERVICE

The above company send me emails and SMS collecting money for NHLS without full information and invoice from their client. The amount started from R159.60 and it ended up to R378. 71 after I have requested an original invoice three time so that I can pay them but they never responded to my emails . I decided to call them so they promise me that they are going to request NHL for an invoice and send it to me which they never send it , then recently when I called them to find out , they told me that I must call NHLS myself . One of their call centre agent (Jane ) was so rude to me she even shouted at me that they can not help me.