Wondering if someone can help, as I am clueless when it comes to vehicle maintenance and really fed up with being done over by garages overcharing me simply because I don't know any different.

Recently my Kangoo started over heating on a long journey. I managed to get home, and next day checked the coolant level which was below the min mark, so I bought some coolant and filled up. However, two days later, I checked the level again and it was again below the min mark, so, bought some more coolant and refilled. Couple of days later; same thing. I have now refilled about 4 or 5 times, but days later the level is back down to below the minimum level mark on the bottle.

There is no sign of any leakage under the car on my driveway, where the van sits over night.

Please can anyone advise me on why this might be happening, so I can at least have an idea of what I am talking about if I need to take it to a garage for yet more repairs (its 10 years old, bought seond hand and had loads of probs with it since I got it, sigh.....)

Many thanks for any help anyone can give.