You should buy a special shoe brush to keep the suede on your shoes fresh and clean. If not, they will become quite slippery.
Women’s heels will wear down over time and can be cheaply & easily repaired by any local shoe repair shop.
It’s not uncommon for the suede on a man’s heel to work loose quickly. If it does, your dancing has probably improved. You can attach the heel pad with contact cement, or have it done cheaply and easily at any local shoe repair shop.
It’s a good idea to put some standard powder in your dance shoes before each use. Since you will be wearing them for hours at a time, your feet will sweat and can slide around quickly inside them.
Try not to wear your shoes anywhere else but on the dance floor. Build up of dirt and, especially, liquid of any sort can damage the shoe’s suede sole permanently.
It is not uncommon for the suede soles to wear out. If it does, it can be easily repaired and replaced by any local shoe repair shop. But, don’t let it go too long or you could end up wearing out the leather that the suede is attached to. If this happens, the shoe may not be repairable.