Hi Upekkha,
Do you hear these ‘voices’ when you are taking clonazepam or when you are not taking medications? It could be that those medications are not working as well as intended in your case, or you could have developed tolerance to those medications, requiring higher and higher dosages in order for them to work, or you could have developed these conditions as withdrawal symptoms for not taking the medications as prescribed.
Furthermore, the long-term use of neuroleptics (which are medications primarily used to manage psychosis, principally in schizophrenia and bipolar disorder) may result in tardive dyskinesia, symptoms of which might include involuntary movements of the tongue.
Thus it is important to realize that there could be neurological causes for what you are experiencing, and to do your best to manage these biological causes to the best of your ability so that their symptoms do not intrude upon your perceptions of reality.
If other beings are causing your experiences, then you may want to radiate metta and karuna to them. But before you do that, please radiate metta and karuna to yourself too, in case these experiences are due to namarupa manifesting due to harmful vinnana (or your inner subconscious wreaking havoc on your perceptions). Afterwards, please make sure that you are calm first, like what Tobias suggests, and then address them with respect.
After all, in the Dhammapada, The Buddha did comment along the lines of ‘hatred can never be quelled by hatred; it can only be quelled by love’. In addition, when Devadatta tried to harm the Buddha by setting an elephant on Him, the Buddha was able to tame the elephant by radiating metta towards it. In yet another sutta, I think, a bhikkhu was bitten by a snake, and the Buddha commented that if the bhikkhu had more metta, the snake would not have bitten him.
In case any beings bothering you are actually pretas, the Janussonin Sutta: To Janussonin (AN 10.177) could help.
In the sutta, the Buddha said that any dana dedicated to dead relatives can only be partaken if the dead relatives were reborn as pretas, and not devas, humans, animals or hell-beings. You might ask the being if he or she is a dead relative reborn as a preta and whether he or she would like you to dedicate any merits or gifts to them. I hope this does not scare you, but it is something you can consider if it is helpful.
Lastly please do continue to perform meritorious acts such as dana, pattidana, rejoicing in the merits of others, sila, bhavana, reverence to worthy ones, service such as cleaning holy places, monasteries and stupas, hearing the Dhamma, teaching the Dhamma, and correcting any wrong views you may have.
I really hope this helps! May you and all beings be happy, peaceful and healthy, and overcome dukkha!