I need clarity

We've been leasing a house through Remax executive in fourways for a little over a year now, rental was paid on time sometimes in advance most times. The reason why I'm taking the time to write this is because of what I've been experiencing lately.

Before renewing my lease I noticed that firstly there were times I was billed twice for water and electricity, that issue never got resolved instead we were going back and forth with calculations.

Before moving in to the property I paid a deposit of R30 000 along with the rental as it stands today the invoice says balance on my deposit is R12 000? How that happened I'm not sure.

For the past 2 months we have been making rental payments late and the way everything is being handled by the office and the agent is unfair to say the least. We have been given an invoice to pay rental for this month but the agent has told us that we must pay and still move out because the owner wants nothing to do with us which is strange. The owner is also apparently not interested in us purchasing the property from her and the agent has mentioned that she will need to beg her to take any of our offers.

There is literally too much that has happened to a point where I'm not even confident that I can actually trust or speak confidently with anyone I have been dealing with thus far.