Very bad customer service

Me and my four sisters decided to sell our house. We were approached by Mr. Adriaan Smith from Remax who offered to sell the house for us. My first appointment went well and the viewers seemed happy. On the second appointment the Mr. Smith and clients only arrived an hour after the initial appointment was set for. On top of that I showed the house to the clients while the agent had a call on his cellphone that he was attending to. To my opinion that is bad customer service, very rude and unprofessional. Then came the offer to purchase which we signed. We didn't hear anything from Mr. Smith and had to phone him to get information on the progress of the potential selling of the house. After weeks of this my sister Memorie contacted his manager and he forwarded the offer to purchase to her via e-mail. On the offer to purchase we noticed that this offer lapsed on the 25th of February 2015 and we only signed it on the 27th of February 2015. Then on the 31st of March Mr. Smith would've met with us with a new offer to purchase at 7 o'clock. After seven I phoned him and he said that he will meet us with in half an hour. Just before eight I left and neither of us had a call from Mr. Smith.