Bad service

Hi I would like to know what I should do.<br> <br> I asked Suzuki motorcycles Richards Bay to service my scooter a Linhai. They collected it more than two months ago. We had a call in the week from suzuki was told we can collect. Getting there today my invoice is missing&the lady who phoned is off. Another lady assisted me&called the lady. Invoice was in the office. While waiting for the invoice they tell me the clutch is slipping. (What?) They never told my husband when he phoned to find out how far they are nor when they phoned us to collect not even my brother when he went there to ask how long they still going to be. They couldn't even find my bike!!! The are already charging me R1800. Now this is great...They don't even know if they can find the part for my bike&if not have to see wich other bikes parts they can use! Can't quote me yet but I have to pay another R350 for labour! They had 2 months&couldn't let me know there a clutch problem! Just expect me to pay more money! It very unprofessional&bad service! What did they do for 2 months. Couldn't they look for it already!