App stuck while purchasing product

### Platform

- [-] iOS

### In app purchase type

- [-] Non-consumable

### Environment

- [-] Sandbox
- [-] Production

### Version
ℹ **Version -> 0.13.3**

### Issue summary

- Retrive product info but, further operations not working as following:

- **Purchase product not working**

- App stuck at `SwiftyStoreKit.purchaseProduct("XXXXX-XXXXX-XXXXX", atomically: true, applicationUsername: "") { result in })`

### What did you expect to happen
It must work.

### What happened instead
**Not getting any kind of response from apis.**

**App got rejected by apple.**