Visa HELPING!

Hello Everyone. I'm from Thailand and I will move to work in KL on this December but I have a few questions which made me worried.

I got a job at XXX company and starting date on 2nd October (both agreed and confirm I can start working on that day). But on 30th September, they told me my application still not approve yet and I cannot go to work.

So, I agreed with them to cancel all of my things which is only cancel from the system and take 3-5 days (they said that). But they did not, they let my application approved! without telling me!! and they did not contact me always be me to contact them first.
** 30th September: the company told me I cannot go to work because my application not approved on time **
** 01st October: the application approved (they informed on 15th OCTOBER/ as they said 1st Oct is Sunday **no words**)**

Now, I got a new job with a new company that they sent my applications also. I would like to know that will be a problem.

Maybe I worried too much and stress myself for no reason. But I need to make sure everything will be ok as I dont want to lose a job which is not my mistakes.

Thank you very much!