Fmb920 unlock code

i have fmb920 tracker it gives me some 20 to 25 digits code with this message “Send this 51425Z1k600F6fD7GcFEL000
code to Teltonika support to get unlock code” i mail but didnt get any response please resolve my issue thankyou

Hi,
For this issue, please contact your account manager or open a new ticket on helpdesk.

Helpdesk

Kind regards.