Reported for something out of my control?

Hi I would like to seek your assistance in a matter. I was doing a flight from Cancun Mexico enroute to Jamaica. At Cancun there was 3 ATC active (ground , departure and approach) I was on the ground frequency and was holding short of the runway when it was my turn to depart I switched to the unicom frequency to let the in bound aircraft know I was departing.
Upon me taking off I got reported for no reason by the ground controller . Was I wrong ?

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Message @Jmacd20.

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