Songkhla has its own immigration office and Thai Immigration in Songkhla has been listed below. You can seek assistance at their office for a visa extension such as a marriage visa or retirement visa extension or a simple tourist visa extension. Their telephone number and a map has been added below.
Note that they are not far from the Hat Yai Highway Patrol offices in Songkhla in Southern Thailand. You can ask them about extending a marriage visa or a retirement visa while you are at their offices. Each office has their own way of completing the process.
Thai Immigration in Songkhla
103 Phet Kasem Road
Amphoe Khlong Hoi Khong
GPS: GPS 7.0066, 100.4643