1.Does anyone know how to get a residence certificate to extend non O spouse visa ( used my husband’s work permit to apply it) from single entry to one year?

The immigration office I went is In pathumthani but they told me since we live in victory monument area that I will need to go to Cheangwattana to get the residence certificate to prove my current address, then I can apply the extension.

What type of documents should I bring in to Cheangwattana to apply the address certificate? Some people said using the water/electricity bills, some said that I will need to use my rental contract and my landlord ID to apply for it.

How many days will it take and what is the working hour there?

2. I went to pathumthani in early December 2017 but they said it was too early to apply, told me to wait until mid-January.

How many days before my single entry visa expires that I can hand the extension application?

Thanks in advance.