Hello, my name is ***** ***** I want to make sure you receive excellent service today.
First, let me say that I am terribly sorry to hear that you are in this situation. It is a shame when a landlord feels like they can do something without legitimacy, especially when that action is quite frankly wrong. As for what to do, this depends entirely on on the nature of the repairs. If a landlord hasn't fixed a serious problem (something that would make this location "uninhabitable") and you have sent numerous repair requests, then you can do the following:
1) Pay for someone to come repair the problem (or repair it yourself) and then sue the landlord for the difference to deduct the cost from your rent.
2) Sue the landlord for the difference between the rent you are paying (make sure to keep paying it) and the value of the defective premises (what you should be paying with all of the problems)
3) Call state or local building or health inspectors and report the issues to them
4) Withhold rent until the issues are fixed (this gets a bit tricky, as technically they can have you evicted for breach of contract, and you would have to prove that they in fact breached first. This is not a great option to try. If you do, however, you need to put the rent in a special escrow account, and follow all the local rules applicable to this)
5) Move out and claim that the landlord was in breach of the contract first (I realize you do not want to do this, I just wanted to let you know all of the options)
For any of these to work, however, it must be a major repair or habitability problem. This must be something that imperils your health or safety. Absent this, your option is to sue for breach of contract because there is something in the contract which requires the landlord to keep the premises a particular way.
If you decide to contact a Housing inspector, the landlord will likely have 60 days to make the repair (this is shortened based on the type of the repair).
The big issue here, is that it would be hard for you to move. You need to really think long and hard on whether it is worth it to get in a fight with your landlord where you may end up better off financially, but you will ultimately have to look for a different place to live.
Please do not hesitate to let me know if you have any questions or concerns regarding the above and I will be more than happy to assist you further. If you do not require any further assistance, please do not forget to provide my service with a positive rating, as this is the only way I will receive credit for assisting you.
Have a wonderful rest of your day.