Longterm customer rip-off

I'd like to complain about how ADT overcharges clients of long-standing. I have been paying R751.67 per month. I have been a customer for 20 years. Each year the premium goes up. Today I asked if ADT has a pensioner rate. No they don't but I was offered a reduced rate of R489.00. Why such a reduction? I was told its because I've been a client for so long and the rate goes up each year. Do longterm customers get **********? Yes, that is exactly what happens. Obviously we should not stay with the same service provider and certainly not for 20 years. Shame on you ADT