I have activated replacement sim however I cannot call nor have any data.

The first port of call is to check your Smarty dashboard online, to check that your SIM has actually been activated. 

If your SIM has actually been activated , then you would need to contact Smarty via webchat : 

https://smarty.co.uk/contact?gclsrc=aw.ds&gad=1&gbraid=0AAAAAD8otYvG6o_kwrijaweE_NmX9wMVx&gclid=EAIaIQobChMIhKzo8PyngQMVhu3tCh33IgmaEAAYASAAEgJkRvD_BwE&gclsrc=aw.ds