Disappointing customer service

I have recently moved into a building administered by Huurkor since Wednesday I have been in communication with their administrators to be able able to access the building on a daily basis. I was asked to email copy of my lease which I did on Wednesday. I was then told will be sent banking details so I could pay and only got them Thursday and I paid on that. I then sent an email to say I had paid unfortunately proof of patment only got emailed to me after I left the office. I sent it first thing the Friday. I called about 3/4 times that day and kept getting different stories. The last call I made at 15h45 and the lady dropped the call in my ear and said that she was not the one that was helping me earlier as that lady had already left for the day. Till this day I can not get into the building. I am very disappointed by the way I have been treated all this time. Its very unprofessional and unfair.