No after Sale service

I was expanding my business and requested ADT to come out evaluate and issue new password as we were taking over a new business. The sales man promptly came out as promised, provided a quote in no time and said if we sign the new contract they will get a technician out to do the required changes, on this basis we singed the quote, it has now been more than 7 months and no technician has bothered to come and set our alarm with new passwords and show us how it works. I complained about this service again in Jan 2019 - a consultant by name of Timothy came out, he promised to have this issues resolved and request credit as we paid for a service we not getting - I have mailed numerous time no interest from ADT!