Deliberately delays transfer of property

We purchased a property on 28 January 2018, bond approved on 5 Feb. Please note that there were no conditions in the contract. on 5 Feb I let the agent know that our bond is approved, later the day she informs me that the seller can only vacate on 1 May. STBB used a whatsapp to "incriminate" us and says that we agreed on 1 May occupation. The property had to transfer in our names on 29 March 2019. We are almost 30K out of pocket and STBB Somerset west informs us that they will register once the owner indicates he is ready to move out...so this could be any time, day, month. they deliberately delay transfers even though the law says that a transfer my not be delayed(according to their director). Please if you have a choice do not use this firm. if the seller insists do not buy the property. STBB does not take the buyers interests into consideration. We have appointed an attorney and this is going to be fun. they will ultimately lose two clients with their "client" having to pay our cost. These people are governed by law but they use it how they want to. Also read your contract and have an attorney look at it before signing. STBB will never see our business again because of the lack of accountability, ********* practices and deliberate delays to keep their "client" happy.