FNB HARRASSING ME WITH TREATING SMS AND CALLS

Received a sms FROM FNB HOMELOANS YESTERDAY AND TODAY THAT SAID I AM R148 IN ARREARS FOR 2 DAYS I MUST PAID IMMEDIATLY. THAT IS IS HOW FNB IS HARRASING ME EVERY MONTH.I HAVE MY HOMELOAN MORE THAN 20 YEARS BUT FOR R148 THAT IS IN ARREARS THEY WILL KEEP CALLING AND SEND TREATS WITH A SMS I can not believe that fnb was classified as one of the best banksI Wonder If they newspapers know about the way they really treat their customers