Wifi router

Good Day. I have a problem. My wifi was put off by telkom and I paid my arrears. It has been 5 days and my wifi is off. They tell me my internet is active. They sent techs to my house to look and my router and then tell me I must take my router in. I only have my router for about 5/6 months. The cape gate store tells me I must have the blue piece of paper that was in the box. I was never told that should keep a piece of paper to replace something I didn't damage. I have all the wires and stuff but not the book. I was never told to keep a book. Now I'm sitting with a wifi router that does nothing. The tech support told me it is not my fault but a production fault, yet I can't swop my router. The tech plugged his router on my line and his work. What must I do with a router that doesn't work. Telkom Account no : ********** 59309 Complaint 541CWK211217. They said, even if my router goes for repairs there is no guarantee that I will get a temporary router.