Maybe customer support should take a stronger stance on understanding and being understood using standard dialect. At least the CSRs that I usually seem to talk with could use a good basic communication course.
Students will use what they learn from me more than you think if they want a degree. If they don't want one... well, we have several excellent nearby trade schools where they can learn a skill that won't require formal standard English and will make them a whole lot more money in the long run (I'm honestly saying this respectfully).