Wrong device installed and failure to fix it

I am so disappointed in their service they are unprofessional and can not resolve their own mess. When you call them they send you from pillar to post without getting a resolution. I called them for a car tractor the first woman I spoke to was attentive and understood that I asked specifically for a panic button which the lady confirmed but when I was transferred the second lady didn’t ask about the panic button but rather used their own terms which I thought included the panic button as stated from the previous conversation, when the technician came he installed the device without a panic button when I asked him he said the device that I requested does not come with a panic button. I called them they send two voice recordings which of the one states that I asked for a panic button, they don’t listen to their recordings because I still had to explain to them and still needed to demand them to listen to those recordings till the end that’s when they did and said they will fix the problem after the fact that they demanded me to pay extra R600 for the panic button or pay R2000 for cancellation.They then called to schedule an appointment which was on Friday, no one came. Then they apologized and said on Tuesday, still nothing. They even deducted the whole amount after stating that they will only deduct pro rata as the contract started in the middle of the month. This people are exhausting and unprofessional.