Complex sentence: Fitness First is reknown for high-pressure aggressive sales pitches (harassing pedestrians & subjecting prospective members to incessant follow-up phone calls), overcharging and creating legally binding contracts that are hard to break or receive a refund.
Split into simpler sentences: Fitness First is renown for high-pressure aggressive sales pitches (harassing pedestrians & subjecting prospective members to incessant follow-up phone calls). Other common complaints relate to overcharging and creating legally binding contracts that are hard to break or receive a refund.