Customer held liable for their incompetence

Once more, encountering another disappointing experience with Bash.

This marks the second instance of encountering issues with Bash within a span of less than a month.

I placed an order for a top priced at R200 and paid an additional R50 for shipping. However, the item I received was incorrect. Initially, the offered solution was to return the item in-store, which would require me to incur expenses for petrol, parking, and time. Later, when I inquired about arranging a return via courier, I was notified that I wouldn't be refunded for the shipping fees.

Subsequently, I was presented with a 20% online voucher as compensation. However, I have reservations about ordering online again. Moreover, to 'recover' the R50 shipping fee, I'd need to purchase something of higher value, which seems unfair.

@bash: Why should customers be liable for the costs due to your employees' errors in sending out the correct packages?