Translation of kontaminieren

This Thursday afternoon a group of twenty five belonging to the Language Institute of English will take a trip to the Canadian city Montreal, accompanied and well protected by the bodyguard Linda.
I took my backpack and looked for a minibus that would take me a little outside of the town to a small settlement called El Panchan. I arrived there very early and no rooms were available yet.
We checked in, took a refreshing hot shower and were really happy about our accommodation. As it was late, we took another ride to some restaurant. When we payed the driver he told us that he had no change.