Take it to another authorized Suzuki service center, be that an independent shop, another dealer, whatever. In fact according to federal law and the laws in most states if you perform the service yourself, keep a log and all the reciepts for fluids, parts, etc the manufacturer legally must recognize you as meeting the service requirements for the vehicle.
There is no magic that makes a dealer's shop special, its a shop just like any other. There are good ones and there are bad ones. Any shop that needs to keep your bike for two weeks to do basic scheduled maintenance is likely horribly mismanged and you probably don't want them doing the work anyway. The dealer should earn your return business whether that is for maintenance, repairs, accessories or another bike. If they don't meet your needs tell them that so they have the chance, however slim, to improve and find someone that will.
There is no magic that makes a dealer's shop special, its a shop just like any other. There are good ones and there are bad ones. Any shop that needs to keep your bike for two weeks to do basic scheduled maintenance is likely horribly mismanged and you probably don't want them doing the work anyway. The dealer should earn your return business whether that is for maintenance, repairs, accessories or another bike. If they don't meet your needs tell them that so they have the chance, however slim, to improve and find someone that will.