If you want to use cash credit to buy your membership plan then you need to buy your plan manually and choose the option to pay using cash credit at checkout time.
What do you mean by "I have set manual pay everytime for the plan" and "looks like freeze"?
Do you have an active membership plan listed on your My48 account dashboard?
If not then you need to buy one.
If you need to contact 48 support about this then see the links in my signature below.
