Acorn Broadband Garden Route - beware!

What a shocking experience we have had with this company in the Garden Route! After excellent reception since the installation, in about September 2020, the wifi started becoming very erratic. We upgraded from the 6 meg line to 10 meg, thinking this would sort the problems out. However, they continued, so much so, that our tenant, who at one stage was the only person using the wifi when we were away for 4 months, and who was teaching English online, was fired for unstable wifi. Yet the previous tenant, who did the same thing, quite happily worked on the 6 meg line with us, our visitors and our volunteers who worked here! We were given every excuse in the book as to why the usage was so high, some totally irrational. One night it was an absolutely basic Oppo, not being used, apparently using all our bandwidth, the next another cellphone, with not one application open. Then they started telling us our speedtests were not accurate - the speedtest they recommended we use! We downgraded back to 6 megs, since 10 hadn't stopped the problems. The more we explained to them we had better wifi with more users and usage on a 6 meg line prior to September, the more they insisted we needed to upgrade our package again! Then to top it all, recently 2 unknown cellphones were drawing all our bandwidth, we even checked around our property to make sure there was no one nearby who had hacked into our system, we asked them to open a ticket as to how this was possible twice, we have yet to hear from them about this. We were told we were uploading too much, on our 1 meg upload, but when our wifi dipped down to 2, there was still .85 upload left according to our speedtest, but we were told we were overloading the upload, that's why the download dipped. Last night, we zoomed from offline up to our 6 megs a dozen times, with no change in our users or usage, screenshots with times were sent, we were simply ignored again. They had started just ignoring us when we messaged them with an issue quite often and the final straw was an ugly message from them today, saying they were quite happy to suspend our service, due to our complaints, when we asked where their offices were so we could go see them! Unbelievable - that's the type of message the customer should send to the service provider! We have asked for our installation fees and monthly fees from when the issues started to be refunded, otherwise we will have to go to the Small Claims Court, and the other name and shame forums available to the consumer. Beware - Acorn is great - unless you have problems with their service!