Quick Heal Technologies Pvt Ltd — not giving handset back

This is the second time I have sent my handset under the same claim no.[protected] the first time they also took more than 2 months and now again they have took more than 2 months since I have given them my handset each time they just say that handset has been sent for repair and we will send you as soon as we get it from the repair centre .
But can anyone explain isn't there any time limit or we have mistaken for trusting the brand name quick heal.