white lines when printing since changed cartridge

[Suzysue]

My two month old hp envy 4527 was doing great until i changed the black print cartridge for the first time two days ago and now im getting lots of white horizontal lines. I've done a cartridge clean abd a print alignment but stiil got poor quality printing occurring. 

Please advise or provide an email or uk phone number to call otherwise I'll have to return it to the store and get a replacement  as i need good quality printed documents for a meeting tonight. Also having tried various ways to try and resolve the printing problem I've wasted 20 pages  from  my monthly page allowance - how do i get those added back?

Thanks 

[Raj1788]

@Suzysue

Welcome to HP Forums, 

This is a great place to get support, find answers and tips to your technical queries.

Appreciate all your time and efforts.

I would personally suggest you contact our HP phone support for one on one interaction. 

I have sent you a private message, to contact HP Phone support depending on the product that cannot be shared in a public post.

Can you please check your inbox on the forums page for the private message.

Have a great day!