Complex sentence: In the first weeks of opening over 50,000 drivers received a Penalty Charge Notice (PCN) unaware of how to pay the toll since no signage of how to pay was evident nor a telephone number supplied to pay the toll.
Split into simpler sentences: In the first month of opening more than 50,000 drivers received a Penalty Charge Notice (PCN). Some claimed to be unaware of how to pay the toll since no signage of how to pay was evident nor a telephone number supplied to pay the toll.