Accusing people publicly and providing no facts in support is equivalent to starting rumours. Your apology was appropriate since you finally admitted you had no supporting hard facts. To then withdraw it and start down your previous public accusation path again is simply wrong and akin to rumour mongerring.
If you have an issue with someone' behaviour, take it up with HTC. If they tell you there is no issue worth taking action on after reviewing your evidence, then deal with it privately. If you insist on public accusations, then show public facts to support it. What you did and are now doing is wrong.