No Guarantee on Hydrovac Extreme

In November 2015, I purchased a Hydrovac Extreme from Verimark in Hillcrest and was told there was a 1 year guarantee, and all spares were available from this shop. After using this machine 3 times, the rubber sealing strip came off the turbo attachment [ 29th December ]. I took the attachment to the shop and was told by the manager that attachments weren't covered by the guarantee and the replacement sealing strip for this machine was no longer available! A similar strip from another model was tried but it doesn't fit. What must I do now? I bought this machine in good faith thinking I was buying quality and now feel let down. I'd like a response from the owners.