Greetings,
I have read Project Description & we have worked on many API's but can you please explain what kind of issues you have? It is possible that API does not support those issues, so we really have to look at it.
Please drop me a message thru' PMB to start our conversation, as our current bid is just a placeholder since Freelancer requires to submit the proposal but once you respond us, we can then finalize it.
Look forward to hearing from you and talking to you further thru' Freelancer private message board.
Regards,
YK
LEADconcept