the app store keeps asking me for my apple id password And then goes to wallet it happens over and over and doesn’t let me down load something that I have already downloaded before

If you can't make purchases or update apps, including free apps, you need to update your payment method or add a new one. 

See also -> Payment methods you can use with your Apple ID

Payment methods you can use with your Apple ID – Apple Support (UK)

If you update your payment method or add funds to your Apple ID balance, It would take about 1 to 3 business days in order to process.

Try to optimize the range of the mobile network, see this Apple article:

If you see No Service or Searching on your iPhone or iPad

https://support.apple.com/en-us/HT201415

Turn VPN OFF.

Low Power Mode is On.

Charge the iPhone & wait until the battery is fully charged (100%).

The Low Power Mode will turned off automatically.

Call Apple in your region see: Contact Apple for support and service

Contact Apple for support and service - Apple Support

or Contact Apple Support -> Get Support (apple.com)