Deleting Amazon Pay plugin with critically errored site?

While updating my plugins, there was an incompatibility issue with what appears to be the Woo Commerce Amazon Pay plugin.

I’ve enabled debug mode on my site via Softaculous in cpanel, you can see the error when you go to the site.

`Fatal error: Uncaught Error: Class ‘WC_Gateway_Amazon_Payments_Advanced’ not found in /home/brooks/babyrocknyc.com/wp-content/plugins/woocommerce-gateway-amazon-payments-advanced/includes/class-wc-gateway-amazon-payments-advanced-express.php:11 Stack trace: #0 /home/brooks/babyrocknyc.com/wp-content/plugins/woocommerce-gateway-amazon-payments-advanced/woocommerce-gateway-amazon-payments-advanced.php(269): require_once() #1 /home/brooks/babyrocknyc.com/wp-includes/class-wp-hook.php(308): WC_Amazon_Payments_Advanced->add_gateway(Array) #2 /home/brooks/babyrocknyc.com/wp-includes/plugin.php(205): WP_Hook->apply_filters(Array, Array) #3 /home/brooks/babyrocknyc.com/wp-content/plugins/woocommerce/includes/class-wc-payment-gateways.php(88): apply_filters(‘woocommerce_pay…’, Array) #4 /home/brooks/babyrocknyc.com/wp-content/plugins/woocommerce/includes/class-wc-payment-gateways.php(70): WC_Payment_Gateways->init() #5 /home/brooks/babyrocknyc.com/wp-content/plugins/woocommerce/includes/class-wc-payment-gateways.php(43): WC_Paym in /home/brooks/babyrocknyc.com/wp-content/plugins/woocommerce-gateway-amazon-payments-advanced/includes/class-wc-gateway-amazon-payments-advanced-express.php on line 11

There has been a critical error on this website.`

I have limited experience in web development, so alas I am unsure how to disable this plugin and restore the site.

I am also unable to access mysite.com/wp-admin either—please help me restore my page!

The page I need help with: [log in to see the link]