OEM dealer part or OEM replacment?

I had my timing belt and water pump replaced on my 2003 Volvo the repair shop told me OEM parts would be used

turns out they used OEM replacment parts and charged me dealer list prices is this standard for the industry or am I gitten taken for a ride

Generally, a repair shop will charge about 150% of the price you would pay for a part if you went to the parts store, yourself, and bought it. This is standard practice.