PreviouslI had a problem with Membership lite plugin

I had a previous issue with Membership lite. My webhost support team deactivated and later activated indicating the plugin was the problem. I started setting up membership, with registration page etc. Now my webhost support team tells me everything is down, can’t log into WP admin (indicates account not active) Obviously if I can’t get into WP dashboard I can’t correct the issue. Previously I was told by WPMU support there are no problems with Membership Lite. I’ve sure had my share. I think there may be a conflict with WP login registration and WPMU Membership Lite registration login. I will appreciate your help!