Letters: Post Office closed my box!

I went to the Post Office at Balvista Centre last week to collect a parcel that the sender had given me a tracking number for. I was informed by the gentleman at the counter, with a gleeful smile on his face, that due to the fact that I had not paid my annual subscription my box was closed and all mail that arrived had been sent back.
When I questioned this, he checked on his computer and sure enough I had paid the subscription on December 28, 2016. I then asked what mail they had sent back as it had been a couple of days since I had collected post. He happily told me he did not know! He informed me that it was a mistake by the manager. I am extremely concerned as it is the end of the month when most of the mail is sent and I have no idea what has been sent back. I have had a box at Ballito Post Office for 17 years and find this totally unacceptable and incompetent.
The only bright side of this incident was that my parcel had not yet been sent back!
LYNDA VAN DER WESTHUIZEN
Ballito