Worst experience ever with Cartrack

Cartrack advised me that they were not able to debit the monthly premium for their tracking unit on the 27th of January fair enough the debit didn’t got off but they attempted another debit on the 8th of February which for some reason didn’t go off as well however another debit was made on the 15th of February which was successful I’ve sent them a bank statement with this and yet they still continue to harass me with phone calls and WhatsApp message daily, so Cartrack if you’re unable to read a bank statement let me know I can definitely teach your accounts department how to read I don’t understand what’s soo hard about looking at a bank statement which was sent to you which shows you guys debited me successfully, your excuse is it’s not reflecting on your guys system how so when it’s reflecting on my bank statement sort out your systems and stop harassing me otherwise this will turn into a legal matter and it will get ugly! Fix your ****py systems