It sounds like something Suzuki should recall. I wonder whether the dealers / Suzuki would have the same attitude, should some of your hard earned cash happen to stick in your pocket, at time of purchase and when they complained, you pulled the same type of response as they do? Maybe the consumer rights council should have a policy similar to the building trade. Hold back a payment or two for the duration of a warranty period, in case of non delivery of service.
If you are going to DIY a fix yourself, the I suggest still log a complaint with the dealer, so that there is something on record if a further complaint arises at a later date.