FNB Credit card division useless

FNB Credit card contacts me 21 times A DAY on my work number. Note NOT my cellphone but MY work. It has gotten to a point where i havs received a written warning as NO calls are allowed on our work lines but no matter how many times i tell FNB this it just continues. Last month I changed my cellphone number and requested my work number be removed immediately. I received an email stating that this was done which was obviously a lie. Now i am requesting AGAIN. REMOVE MY WORK NUMBER IMMEDIATELY!! YOU HAVE NO RIGHT TO CONTACT MY PLACE OF EMPLOYMENT! Last week i also indicated that a payment of 50 000 would be made on 30 October but if the system was updated as I requested i wouldn't be getting any calls. Seems like no-one is able to do their job or do it right. Now AGAIN i am asking. REMOVE MY WORK NUMBER and update the system with payment arrangement immediately. If i get one more call from FNB Credit card i am going to lose it!!