Paid for Installation but technician never came to install & the alarm

On the 27 February 2020) I sent an online Product Enquiry to ADT; I got a call and I was told a Sales Consultant will contact me to come inspect and give a quote. A sales consultant by the name of Walter came through for inspection; He provided a pamphlet and sent me a quote with the Installation and Service Agreement contract which I signed and submitted back to him. He had also provided me with a payment plan to say I can pay in 3 installments 50%, 25%, 25%.. I then paid the deposit as per our agreement via EFT Public Recipient (ADT Fidelity Pretoria) and my ID Number as reference - the last message was "I am finishing your paperwork now and technical will give you a call ASAP".. Till today I haven't heard a single word from him. I've been trying to call & text; I even sent a complaint to the ADT (***) and no one has bothered to contact me to assist in resolving the issue. I have to alarm system installed in my house, the person went AWOL, and ADT is not doing anything about it even after I submitted a complaint. I feel like I have been ****med by ADT. If this Walter guy cannot do the work or he is out of office, why can't you assign a different Sales Consultant to take over? This is not right and such an inconvenience. ADT is supposed to be the best of them all but clearly there's ******** working for the company.

Contract Numbers are as follows: - Installation Agreement - 307723 - Service Agreement - 228331