Sensor networks, nothing but a well orchestrated ****m

I have a sensor network product that controls my geyser by an app. The service was free until they began to charge for it.i only decided now to subscribe to their services, as the unit is useless without it. I paid 3 months in advance to control the geyser through the app. Now I find out it does not work, as they stopped the unit from ever working again. To get is sorted they want me to buy another brand new unit for R3999, excluding plumbing costs to remove and re install the same type of unit. I will now rip it out and put a geyser timer in. Everybody is out to **** you any way they can nowadays. Beware how they operate