Catrack tracking device malfunction in vehicle

I have a complaint I started to join and agree that they can install a device in my car. But since it was installed there is a malfunction and i reported it many times. Via emails whatsapp and telephonic. Since now nothing is done. Now the telling me they want to take legal action. Im a pensioner and explain to them the situation. But they dont adhere to my problem What can I do See my email received today again

Dear Elizabeth Johanna Stadler

Cartrack may have to proceed with legal action against you and list you as a Default Payer due to your account still being in arrears with an amount of R209,74. To avoid this, settle your account within the next 10 business days.

Pay now using the PAY NOW link below.

Alternatively, you can pay your outstanding balance with Pay@ at any major retailer using *** as your reference number.

If you have any queries, please contact us at *** or call us on ***.

See you on the road, The Cartrack Team