Disrespect and Incompetence of Queenspark

I exchanged an item, and was asked to provide contact details, so that if they needed to query the exchange they could contact me. Queenspark took this to mean that I had given them permission to bombard me with Spam via SMS. Even though i then sent a message to opt out of the Spam (to the number they provide for this purpose). I continued to get Spam from them. I sent an email, with details and was contacted telephonically to assure me that my number had been removed and they would look in to why my number had not been removed when I sent SMS. Two days later I get further Spam to the same number from them. This actually speaks of Queenspark's disrespect and incompetence, in regards First that they don't give you option not to receive their Spam Second Queenspark don't respect my information and consider that by been provided with contact details, it is their automatic right to Spam Third even after send a message to opt out, Queenspark does not respect that request Fourth after contacting a person telephonically and informing you that they had done what you had requested, you still continue to receive Spam