I've been paying my monthly premium and they cancelled my car tracker in 2016 whilst the money is deducted monthly and they failed to prove their R10 000 arrears they say I owe

I bought a car in 2015 which was fitted with Alcatel tracking device as per insurance policy (Oakhurst) I've been paying since then and have provided them with proof. Oakhurst confirmed my premiums are up to date but Altechl Nestar said I owed them R10 000 and thus have cancelled my tracker system in 2016 yet the premiums are still deducted monthly. Now as it is I don't have tracker for my car and premiums upto date they have handed my account to the collecting agency which is bothering me to pay