JUST LETTING PRETORIA NORTH

So on the 01/10/2018 we moved in to a rental house and signed a leas contract for 1 year which will only expire on the 30/09/2019..worst mistake of our lives .We honestly thought that the house will be our temporary house while we still busy with the construction of our house.On the 15/10/2018 I received a call from a certain man saying his an estate agent and that the owner has put the house for sale .It has been a nightmare ever since,i don't understand why just letting failed to inform us that the owner had plans f selling the house immediately ,an gave us the chance to make an informed decision .We have people walking in and out of the house every other day for a viewing ,invading our privacy.I am sick and tired of that house ,I lost my peace of mind the minute we moved into that house.And when all this nonsense started I immediately informed the just letting office and nothing was done.I feel like they have no care for tenants ,,and they have been inconsiderate .We still have 7 months left on the contract and remember the viewings have been happening already over the past 5 months .I just want to see myself out of that house ..iv had it .WE WERE BLIND SIDED BY JUST LETTING ..THEY SHOULD HAVE TOLD US WE RENTING A HOUSE THAT IS UP FOR SALE AND THAT WE WILL HAVE STRANGERS WALKING IN TO THE HOUSE FOR 12 MONTHS .VERY DISAPOINTED