After facing lots of issues with my mining account they have given me all my earned BTC back. And also upgraded my package. (Note: not free I have given the package fees before but for some issue, it's not upgraded)
When I asked about delayed responses and account issues they replied this:
We apologise for inconvenient and delayed transactions responses. We are getting tons of request daily for free mining, and we are happy about that but the problem here is that our support team couldn't handle all the problems at once though we are functioning 24*7 in a double shift to solve your problems. Soon we are expanding our team for better support. We appreciate your patience and have upgraded your account to our top mining package for free and as you can see we have restored your account. If you have any further query then please feel free to contact our support team.
Multimining Support Team,
And The best Part here is that my mining speed is double now and yup got my first payout (The reason for posting this review). After reading this reviews I got to know that lots of people are facing problems regarding mining. I hope soon this issue will be solved.