We are sorry for your overall experience. Our promise is always to offer to return when a clean is not to your standard, as we did in your case. As you had raised this as a complaint our standard official content explains we do not accept refusal of payment but as said will return where instructed/requested. This not meant to be threatening but just to clarify so you know how we progress and handle complaints and so bills are not left and end up being passed to debt collection.
It is noted that you called and apologies for not being able to leave a voicemail. We do not use an automated phone system as lengthy holding on line causes extreme frustration, however our voicemail facility does get full and we always recommend email where you can.