Internet keeps going down

From the morning I woke up, my Fibre line keeps dropping. I work from home and need to remotely connect to work. I also get paid only for the work I do. So having a line that is up for a few minutes and then down for an hour is not acceptable. I phoned mweb. After going through the whole process the lady put the phone down as soon as I explained what is going on. I phoned again. The guy told me that there is nothing wrong, but he will do a reset on my line. 10 minutes later and my line is down again. I phone again only to be told I can't be helped unless I connect my PC straight to the Fibre box with a Lan cable. I only have laptops and they don't have a place to plug in a Lan cable. So now I am losing thousands of Rands because I can't work and mweb won't help me unless I can find a PC with a Lan connection. This is totally unacceptable.