Mediocrity standard practice

I cancelled with Metrofibre because I can get the same line on their network for R500 a month cheaper using a 3rd party supplier, crazy and silly but true. A month ago a technician wanted to pick up the router I asked him to come today the 17th of June as my contract only ends with Metrofibre today. Today I have no internet, no one showed up, the new ISP has no clue what's going on. I've been on the phone with these guys the whole day, they simply do not care about the fact that I need wifi at home to do my job. They quick to invoice, I'll be sure to invoice them for my loss of income let's see how long it takes to sort this out...they even **** to me and said it's a general outage but I checked with family in the area and their fibre is up. I'm deeply disappointed when mediocrity is the norm at certain companies, it's soul destroying why must you get nasty write reviews and be mean to get any service. I have lost hope for today, I'll scream at them tomorrow again, but a little louder. Who should I direct the invoice at metrofibre please advise.