Do I have means to quit using MSSQL database via Control Panel? (I am planning to use Access-mdb instead - at the end of annual period) Or I should "order" this srevice via Technical Support mail?
You're welcome to use a Microsoft Access database. You don't need to order anything since an Access database is a flat file database. You can just upload it to your hosting account. I recommend putting it in the _database directory as it is secure.
My question was next: how could I EXCLUDE annual payments (120 $/year) for MSSQL-database from my account ? Meaning "dis-ordering" this "add-on". (The end of my annual period will be at december 2013 - so it still "can wait").
To cancel the SQL database add-on please contact our billing department and ask them to cancel it for you. Please read our knowledge base article on how to contact our billing department here: http://support.discountasp.net/KB/a87/how-to-contact-the-billing-department.aspx