Help me out ! Where do I get big size dress for men in Oman

Me being a big guy, Centrepoint was my go-to store for years to buy plus-size clothes. Every time they had a sale, I’d do my shopping for the whole year because the quality was good and they always had great options in larger sizes.
Now it feels like Centrepoint has shrunk, and so has its plus-size collection. I’m really struggling to find good-quality clothes that fit well.
What do I do now? Any recommendations for stores with a good range of large sizes and decent quality? Help me out!