Second time in 2 months pathetic service

I bought a Renault Stepway in January 2014. My first service was therefore to be done in January 2015. I took my car in February 2015 for its first service and the service attendant informed me that on their system it shows that I bought the car in November 2013. He then informed me that because of this I had to bring the car in for a service again in December 2015 so I could bring it again in December 2016 for its final service, otherwise I would lose the last service. So I did that and in December 2015 they told me its too soon that they wont pay for it. This they however told me only after keeping my car for the whole day! They called me at around 9am and told me so I explained the story about the first guy telling me I should bring it in December and they should give me the contact details of the company and I will call an explain. Heard nothing from them the whole day (after calling 4 times). I complained to the manager and he said he will organise everything to be correct and I need to bring it again in January. so I bring it today and they make me wait until 5:30 bcz they have to wash the car. only for me to get the car and it hasn't been washed AT ALL! ***********!!!