give a call to your property management company, they always have the best deals

Do it yourself. Rent a wetvac from the supermarket, follow the instructions, and let your carpet dry for a day. shouldn't run you more than $20. Unless you have specialty rugs (oriental carpets, for example) or are cleaning an entire house's worth of carpets, or your landlord is going to pay for it, there's no reason (imo) to hire a cleaning service.