Be careful about doing this as you’ve explained the orders are actually shipping or have a date. This process is for actually canceled products that will never ship. Being slow isn’t breaking contract

You have a right to be unsatisfied even if you do eventually receive it, but as other comments have stated, it’s not like the product has gone silent. A breach of contract is a reason to contact your bank. Being slow when the product was originally advertised as being slow to arrive isn’t a breach of contract

If you really feel the vendor is giving you the run around, then that’s a different story, and let’s be clear, either way your experience is a bad one and you have the right to be unsatisfied with it