Nashua Vehicle Tracking - STAY TF AWAY!!

I have a small shuttle business. (3 busses) At the end of 2019 I was approached by Nashua Tshwane to try out their vehicle tracking product. It looked to good to be true.... (!!!!) It was cheaper with more functionality.... Then we were hit with COVID-19 and lockdown. I was forced to sell two of my three busses. I tried to cancel two fo my three x R353 pm subscriptions... I was told I am locked in a contract for FIVE YEARS. Settlement is like R21 000!!! How is this legal? Do they have no shame?