Fed up with incorrect information given

so ive tried to upgrade my data contract in feb as ghis was my time for renewal, went to the store and app**** for a laptop which was on promotion and no stock as usual. no one contacted me as according to me this is a rain check. so I've decided to have the contract cancelled as i will be on maternity soon. ive been to the store to have it cancelled where they gave me a form to mail to customer services, I've devided to contact the customer team and was advised to go to the store, again ive been given a form to have it cancelled, foned back and the agent advised that i need to go back to the store and have it cancelled, so on friday it will be the last that i will go to the store and if no one can assist i will be going to the ombudsman and cancel my direct debits as I won't stand for being pushed around