Harassment marketing

I looked into Cartrack's products online and asked for a quote. Within a minute my phone rang and I got a comprehensive run through of all products from a friendly lady, Lebo. I told her we are comparing our options and we agreed a time on Monday the following week where she'd call me back and I'll confirm whether or not to go ahead. The chances were big, as the product and pricing seemed great. Three days and TWENTY-THREE calls later, this is borderline harassment, and the taste in my mouth about Cartrack is absolutely terrible. Don't you have a system that shows I have been contacted? Do you teach your telesales agents to call back if I decline the call, THREE TIMES in a minute? That is super rude and seriously not a great marketing strategy. To call me TWICE before 07:00 AM on a Saturday - do you really think I will WANT to do business then?? I am seriously weighing up ALL other options now, as I can't do business with such unprofessionalism.