Service goes down on every school holiday and public holiday

Every public holiday and school holiday, without fail, my internet goes down. The technicians that are sent out never seem to know exactly what the problem is. It seems that they have a list of possible problems at randomly choose from this list as to what the issue might be, whether or not that is the actual issue. At this point, my internet went down yesterday morning (on a public holiday). It first went down on Saturday morning, but went back up an hour later. At this point nobody seems to know what the problem is - the call centre agent wasn't able to reconfigure my line remotely as she wasn't able to get onto the line and deduced that the issue was on the exchange. I sometimes wonder if this exchange actually exists as this is where the technicians disappear to and never come back. This is truly frustrating as I am paying for a service which promptly goes down as soon as I am at home and want to use it. It would seem that Telkom would prefer that I pay for a system which I do not use as the internet merrily works while I am at work yet goes down as soon as my kids and I are at home. This is a truly frustrating situation yet Telkom does not really seem to care as when I voice my frustration all they can say is sorry for the inconvenience, yet they don't try to sort out why my Internet goes down EVERY school holiday and EVERY public holiday. At the moment I am on day 2 without internet and have two extremely miserable kids at home with no access to anything.