Terrible service and unresolved issue with faulty sim card received in my wi fi router

I am very unhappy with the service I received from Vodacom. My Mom is the main member on my account. I was contacted by an Agent named Shaun on the 27th of March to offer me a better deal on Ipad which I accepted. He then offered me a Wifi router which offers 5 gigs during the day and 5 gigs during the evening. Shaun then confirmed everything with my Mom. The wifi router was delivered to my Moms work address on the 01st of April. I tested it that evening only to find it was not working. I spent an hour on the phone on the 2nd of April trying to resolve the issue only to be told the sim card was faulty. I was then told that a courier would deliver a new sim card and take away the old card. On Monday the 15th of April a different agent contacted me to say my account is in arrears by R120! I was originally advised by Shaun that I would only be charged at the end of May! Since then no one has come to collect the old sim card and no one has contacted me. I am really disappointed with this terrible service and lack of communication, and I am now sitting with a router for almost 2 works that does not work.