Aggressive / intimidatingly / invasive / antagonizing marketing method used by Truworths

I received 55 sms' & calls in 19 days, to increase my account limit. I actually blocked the numbers but it is still going to my voicemail as calls received and a voicemail is on my cell, without a message in the voicemail. This is an aggressive / intimidatingly / invasive / antagonizing marketing method used by Truworths, trying to take the decision out of your hands on when / if / how you want to accept / decline the offer. I am seriously contemplating in closing my account with Truworths because this is the second time that this marketing method is being used by Truworths.