Incorrect advertised prices

I placed an order on good friday for Camping gear advertised on sale. Paid for my order on the 7th I received an email my delivery will be delayed due to supplier stock issues. on the 10th I received an email my order has been cancelled and my account credited due to incorrect pricing advertised by the supplier. I have been fighting with Take Alot as this is not fair this is the 2nd time this is happening where my orders just get cancelled due to incorrect prices advertised. How are we supposed to trust that the prices we see advertised is the correct price and how are we protected as this is a norm with take alot they just credit your account, and you must just be satisfied with the **** they give you.