Refused to accept and clear my salary cheque

I stood in the queue for the tellers for 1 hour and a half and when I get to the teller, he tells me they wont accept my salary cheques and clear it same day and if they do take it they will only clear it after 7 days, I then asked how is that possible ,then he called his supervisor a lady who also wasn't willing to assist,I even asked them then why do you guys as FNB ask the question \HOW CAN WE HELP YOU'