useless mobile Wifi

i received a call from Telkom, offering me a huawei mobile wifi which was delivered last week Thursday(7 December 2017)i was informed that it would work immedietly as Rica is done upon delivery. i got home and tested it, it wasnt working then Friday morning i received a call from a lady and she said she was calling to confirm my details so she could activate the connection and that the moile wifi would work in 24 hours now that means it was supposed to work by saturday. The etire weekend this thing wasnt working,i called on Monday and the lady i spoke to told me that the sim card wasnt activated and that she had to activate it and when i asked how, she did not have an answer for me. she then said she was activating the sim card for me and told me it would work in hours or maximum of 48 hours, nothing has happened till today. i called again today, and have been told the same story by Karabo that the sim is not activated and i should wait another 48 hours and she told me she doesnt have the mandate to activate it but is escalating the query. i then asked her to give me an email address i can use so that i can have proof that i have been given the run around and she just transferred me to another department without telling me that she was transferring e after telling me that she cant transfer me to the department that is supposed to activate my contract. my qustion is why call me and offer me something that you know you are not going to mke it a point that it works for me as a client, what is that all about, are you guys only concerned about sales so what happens after i have taken delivery of the device doesnt matter to you? is it because you know i cant take it back to the store since i took the contract telephonically. Someone please tell me what i need to do? Can you guys take your mobile wifi back since its not working for me.