Appalling service - Will be cancelling!!!

After having been a client for more than 10 years, I am appalled at the service received over the past few weeks. Due to severe illness, I was hospitalised in Jhb. After numerous calls from Blue about alarm activations, I agreed for them to come and install a guard cell on my gate so that they could have access. Technician came and installed the unit. Immediately after this, my gate which was working perfectly stopped working. Despite numerous interactions with the technical dept, to date gate is still not working. Technician claims he only knows how to install a guard cell and cannot assist even though he messed it up. To add insult to injury, I have just received a bill for the guard cell. I am 76 years old, in ill health, and Blue now expects me to open this gate manually as they are unable to restore my gate to its previously 100% working order. It has been over a week now and no communication from Blue about my gate except for the Guard cell bill.