Offense Against a person daw????need advice asap plz..

I have a supervisor (probationary) who complain in our HR department na I approached her daw na galit ako at malakas ang boses ko,na hindi nmn poh talaga un ang nangyari.which resulting sa pagkaka issue sa'kin ng incident violation report and pag napatunayan na totoo un eh 6 days suspention and diciplinary action sa akin

last day q poh bukas para mag submitt ng explanation letter ko..

and gusto q poh sana umapila ng complain na hindi un totoo and sobrang dishonesty ung mga statement nya sa akin..

alam ko poh nasulsulan lang yun ng ibang officemates ko..

I want to save my image/dignity in the very last minute posible...

anu poh kayang pwede kong ireklamo sa HR nmn para nmn madopensahan ko ang sarili ko..at nakikita q naman at naririnig kung panu sya talaga sigawan ng ibang officemate ko at pamukain na tanga pero wala xang ginawa..ako lng ang nireklamo nya at hindi pa totoo,

pls poh klangan ko ng sagot asap...maraming salamat..

just give a written explanation of what happened and attach the statements also of your witnesses