Unauthorised Credit Card Limit Adjustment

To whom it may concern,<br> <br> I received the following sms at 14:00 today, 3 December 2015:<br> <br> FNB - Due to responsible lending we have systematically adjusted your limit on your FNB Credit Card from R00000.00 to R00000.00 FNB a div of FRB Ltd.<br> <br> I've not included the amounts to security reasons but the limit was decreased. Surely us as customers are to be contacted if such a decision is made? Furthermore, should it not be written correctly so as to reflect correct terminology to match the limit?<br> <br> I pay my instalments every month and on time. Why should I receive a decrease in limits?<br> <br> I would appreciated your response and clarity on the issue.<br> <br> Regards,<br> NS Carroll