as amant said you can go through that and do it yourself doing a flushing of the oils and that by changing it and driving it then changing it again, dont worry about the 7 gears thing as they are not mechanical gears it wont matter i dont think.

You can have the CVT flushed at Honda but it will be expensive, they use 4 times the usual amount of CVT fluid and pump it through the Gearbox etc in an attempt to rid of impurities. Thats why it costs so much to flush, because they use so much oil, and then charge their labour. I would recomend this if it hasnt been done before.
if it has been done and no effect then your really out of options other than changing the start clutch which can cost around 1000-2000$. up to you whether you think its worth it.

But heres my advice either try what amant said, or get the flush. if it helps from then on just do the CVT oil change with every engine oil change at no more then 10,000kms.