What a horrible way to deal with a customer

I bought a stove few ago at Game Store, after some time I went to the store and paid for installation. The following day the Servi-Sure company came to my house and said there was R200 short in my payment because they are using their cable well my sister paid them since she was home but it was a surprise to me since I was that they don't do cash the customer pays at the store as I did. Well since they failed dismally to do their job I phone another company personally for the stove installation. I phoned Game serveral times reporting the matter, Servi-sure got back to me I reported how it all went down, the lady I was speaking to advised me I will get my R200 back (and yes I did, same day we spoke). Well today I phone game, the first call cut off because I did not have enough airtime. I phoned again a lady picked up again, I kindly asked to be transfered to stove department, they did not pick up (phone rang for two minutes). I phoned again, the same lady picked up at the reception (Nonku Nene) she said I've a lot of airtime, so much drama, if I need a refund I must come to the store and stop calling since I can see nobody is picking up there's no one in the stove department, I asked her to transfer me to the stove department she said what I want because she just told me I need to do. Well I said Nonku you don't have to come with your frustrations at work because now you're being rude to me. She started shouting at me, I said to her the calls are recorded I will report she said I must go ahead and transferred me to the stove department where I spoke to guy he said he will call someone I waited until my airtime was finished. Just now when I was typing this a guy from Game Store just phoned me and said I must come in for a refund. I'm sad and disappointed, I'm crying as I am typing this with the way Nonku Nene spoke to me I'm very sick I'm on medication.