Hi,
You need to ask your hosting provider to do so. Moreover, if you search for the error message with "Global" in it you will get Kentico related problems, because the "Global" is specific for Kentico, if you will search for the error code CS0012 you will get lots of non-Kentico related problems and posts, for example:
http://stackoverflow.com/questions/284433/strange-error-cs0012-the-type-x-is-defined-in-an-assembly-that-is-not-referenc which is talking about GAC, but since you are using hosting provider, I think you have not added the assemblies to GAC, so the only way how to solve it is to clear the .Net cache.
It happens sometimes when the application is restarted by .Net framework, that some assemblies are not loaded correctly to the cache, which is .Net related problem.
Best regards,
Juraj Ondrus