Poor service

I had installed the Netstar tracker on two of my previous vehicles and since last year August. I called Netstar, written an email and also used their WhatsApp services to cancel my contact with them and to date its still not canceled. Received an email stating that they had handed me over to Hybrid collections.So disappointed in this company for such bad service. When you call the line to cancel your contract they hang up the calls. I regret doing business with them hence I used a different company for my two new vehicles. I even want all my family members to cancel their contracts with this company. Very very bad services.