2000 Vauxhall Corsa car revving to 5000 revs with every gear change

Hi just wondering if anyone has had the same problem as I am having?? WARNING to driving instructors about vauxhall corsa 60 plate onwards!! You have prob seen over the past couple of months I have been having problems with my 60 plate Corsa :-( 6 times vauxhalls have tried to correct the fault and failed! Fault being When you take your foot off the accelerator and put the clutch down to change gear it revs itself right up like you have kept your foot on the accelerator! Vauxhalls turned around to me today and said the fault is caused by the car being drove wrong and if you have not fully took your foot off the gas before putting the clutch down on 4 accessions this fault will happen! My answer was I've been working as an instructor for 11 years and always had a corsa to which he replied you haven't had a corsa with this new software have you (in a nasty voice) he told me I need to disconnect the ECU and battery myself then leave it for 10 mins then reconnect it!! So I said your telling me that driving instructors and also people who are on incapacity shouldn't buy one of your cars as you can't drive them wrong 4 times? He said I'm just telling you your driving the car or your learners are driving the car wrong!! What a load of @##*!