When your inspection was completed, your Realtor-or you if unrepresented-should have sent a repair request addendum to the seller. At that time they should have agreed in writing, on the addenda to make requested repairs. You should have received notice of expected repair date and a notice of completed repairs through the agent, so you could re-inspect.
In MD, everything must be in writing. verbal agreements concerning real estate are not valid. Talk to your Realtor-whom I agree, should be on top of any repair requests. IF the repairs were requested and acknowledged in writing and are not complete, you could have a reason to void contract, but this should never be your first option. If you are unrepresented, talk to a good RE Attorney before just "walking away". You could find yourself losing your deposit if all is not handled in the appropriate manner.
Good Luck! - Earlier today