How can Pick n Pay allow marketing staff into the stores?

Earlier today, I went to my local Pick n Pay, Main Road, Wynberg, Cape Town, this is not the first time, I'm complaining about this, why is Hollard being allowed into the store & harassing customers like myself & other customers?, I saw Darroll, the Branch Manager at said store, & he told me that Hollard have the authority to do so, how can Pick n Pay allow this?, it shouldn't be allowed as they are hassling customers, please stop this practice, how do I give Pick n Pay, no stars?