Please don’t be too quick to assume that the church in question is teaching the “All believers must be healed or else they are demonstrating a lack of faith” doctrine.
The Christian and Missionary Alliance is an evangelical denomination that teaches a Four Fold Gospel: Christ The Savior, The Sanctifer, The Healer, and The Coming King.
The C&MA recognizes that Christ may choose to heal either through medical science, through a divine miracle, or…through the “ultimate healing”–dying and going to heaven.
Lots of evangelical churches also teach this.
I’m pretty certain that we Catholics also teach this. We pray: “Thy will be done” for our ill loved ones, and trust that the Lord will either allow the doctors to heal them, or that He Himself will miraculously heal, or…that He will allow our loved one a peaceful death and eventual entrance into heaven, where there is no more sickness.
So it may not be “health and wealth” at all, hopefully.
I googled the portion of the statement of faith that you posted and found a church that uses this statement word for word. It was a Christian church, which is a non-denominational church. If this is the case with your dear ones, be on the watch. Many Christian churches teach an orthodox evangelical doctrine. But because there is no denomination, an unscrupulous pastor is free to establish his own beliefs, which may or may not be Biblical or Christian at all. There are several incidences of Christian churches that became cults, most notoriously, the Jim Jones cult. Please watch and pray.