thanks for the reply, gauging from your response it seems like its something that be sorted easily enough without any other major problems to the car ie i didnt know if the oil was going into places it shouldnt go that was going to make the engine breakdown or seize up or something.
It sounds like its something I prob wont be able to do myself to be honest, but if I take it in and the mechanic starts telling me that there are all sorts of other problems should i tell him to take a hike??? I guess what I am getting at is if they see me coming from a mile off and that I dont have a clue about cars they may try and say I need the engine replaced or something and I really cant afford to be ripped off... so will be helpful if I can pretend I know what I am talking about and tell them its no big deal or something.. if that is the case. So the question is... is this little mistake going to affect any other part of the car that I should be concerned about, or is it simple to fix once its all drained etc.
THe most common ways for oil to get into the cooling system are for either the oil cooler to leak or the transmission cooler to leak (on an automatic transmission car) The third most common I would say is someone doing exactly what you did- it happens. You don't have to tell a shop what you did, just tell them what you need to have done- Say that your cooling system has been previously contaminated with oil, and needs to be cleaned again with a detergent. Let THEM assume that you have, maybe, already had an oil cooler replaced or something, and are still noticing oil debris in the coolant. Tell them you need it flushed with a detergent, not regular coolant flush (which is normally to remove calcium or lime scale, or rust flakes) and refilled with VW coolant. If anything, they might try to sell you a new coolant reservoir- sometimes it is difficult to get all the residue out of the coolant reservoir and it can coat the coolant level sensor contacts and make your oil light blink, even when the level is OK.
If they try to sell you anything else, just tell them you'll take it under advisement but will "see how it goes" after they do the repair that you are asking for. If they try to push you around you can just take it somewhere else.