Previously I have developed bots for Telegram and Whatsapp. I can help you with this work. Add me on the Telegram @KnightThunder for the further discussion.
Can you show some of your previous work?
Yes, the position is still open but i can't find useful information in the link you gave above for your past experiences. Kindly update it orelse chances of you being considered are too less.
The cheapest will bring most headache, according to my exp.
That's why i would strictly go through their portfolio first.
Why not show it here first?