I need some advice regarding maintenance

[KANTENAH]

We have a company that run tours in an eco resort in Riviera Maya, México.
We have 10 X2. We bought them on April and started our operations on May. When we were considering the business, we spoke to Segway México and among other things, they told us that they could offer us a regular maintenance service every two months. The cost would be around 30 UDS per machine everytime.

After having tried to have a formal agreement for a long time, we received their proposal this week. Needless to say that their offer is far away from that amount as what they are offering means around 10000 USD per year. They want us to pay in advacen the whole year.

We have had several problems since the beggining with the support service from SEGWAY México. The machines are simply fabulous but first we needed to change a info key because it didn't work (we still have not received a new one and we send it to them about a month and a half ago); one of our guides lost another one (after having paid 310 USD, we received two months later) and we have two of the machines that showed the same erro (E047), were sent to México City about three weeks ago and it seems they will have to be sent to the US to check what's wrong with them.

Here is the question. How does it work in the US? Does SEGWAY offers a preventive maintenace service or you simply have to bring your machine to the suplier when they have any problem? And if any of you have any type of similar contract, how much do you pay monthly or yearly? I know we are talking about different countries but, at the end, they are the same machines.

Many thanks for your help and assistance.

SEGWAY FUN TOURS.